Yikes, I am so sorry. I have been in this position before and it sucks!. I can feel my head swirling about it like it was yesterday. However, now is not the time to panic. Now is the time to self protect.
What I mean by that is? Why are they getting rid of you? Why the bad review? Could it be linked to your OCD and depression? Did you tell your employer and suddenly you got a bad review? Is there a wrongful dismissal here?
You have 3 months of working for the company. Print any emails to do with your performance and take them home. Any emails that suggest you have done something wrong at work? Any emails you have sent out that might prove you did tell someone at work about your mental health challenges. Previous performance reviews. Any dirt you can or do have on the company that you can use as leverage to get a better package and a letter of reference from your employer when you leave or get help finding a new job with an employment counselor.
Next check your finances. Do you have a car loan? Can you sell the car and cover the loan if need be? Do you have any savings? How long will that last?
Is there any programs you qualify to go back to school and have it paid for if you are unemployed?
Ok, your resume. If you are not great with resumes, pay someone to help you with this. Your resume is going to be very important put the money here but make sure it is an expert who helps you with it.
You can do this. You can get an even better job. You can survive this. It is a shock right now, but you don't owe this company anything so do what is best for you.

Sorry guess time to think of new career choices

Ask about a different position in the same company.

Work is tough. I cannot even hold a cashier job. You are better then me. In these ages, we cannot depend on a job to survives. Look at Youtube. There are millions of videos teaches how to make money. Social media have many groups and schools teaches how to make money.

Good luck. I’d suggest using all of your free time applying for jobs and interviewing. I’m having a rough time at work as well. I was written up for the first time ever. I recently asked about cutting my hours, as 45 hours a week is too much and was told bluntly it’s not possible and I need to consider if I can continue my position.

Wow and Wow!! I agree with all of the tips above, but it seems like you are in emotional turmoil as well. Do you have good supports (family and friends)? Maybe time to lean on them a bit for support and to take good care of yourself.
If your disability interfered with your job performance you could ask for an accommodation. And depending on where you live, you can seek professional help, almost always for free from your state department of vocational rehabilitation and/ or the department of unemployment security. What a blow this must be to your sense of safety and stability. Please keep us all informed as to how you are doing. We do really care here because we get it.
Oh, and to comment on what Onyx and Peter have said, I think that the work culture out there has become very difficult and you are certainly not alone. And I agree with Peter, there are many less stressful things to do if you can take some time to relax a bit after this.

Don't give up, paktha, I too have about 3 months left before my son moves away and gets married and just my regular social security will not cover this apartment and expenses all by myself. I must do the impossible, like you, and get another job. We can do it.

Hi Paktha- I’m sorry to hear this.
It was 3 years ago when my husband lost his job and I understand how you feel because it was not easy to deal with uncertainty. But please don’t lose hope. I pray that you will have peace as you search for a new job.

We are here for you so keep sharing. You are not alone. I hope things will get better for you. God bless.

Hi paktha, been there, unemployed, looking for a job, and having a job and have a little voice in my head saying look.

Best thing I did was ask God for help. That gave me hope. Helped me not to worry, or stress out about things that wouldn't happen. I have learned that my worst fears never came about. It was all in my head. Being hopeful helped me on interviews to relax be the best that I can be.

If you want, i will pray for you.

I'm so sorry to hear this. It must be very distressing. I see some good ideas on the other posts. Is there another job within the company that would fit you better than the one you're leaving? Is there a job there that you've always thought you'd like to try? Is there a job somewhere else you've always thought might be fun? Those might be worth exploring.
Almost everyone gets let go of jobs. Most great success stories started with "failures".
One thing is for sure. You are NOT a big loser---not at all!! You've held this job for 14 years. That's a big deal! Take courage and start again. You never know. This change might be the catalyst for a brand new something that is better than before!