Caring For Aging Parents Support Group
Caring for aging parents can be a difficul time as we become the caretakers for our parents. This broad responsibility can encompass such services as assisted living, adult day care, long term care, nursing homes, hospice care, and in-home care. Whether you have just started caring for your parents or just need a place to talk, we're here.

You might need to pull a huge guilt trip on your mom (and scare her a bit) and tell her that there is NO QUESTION, she will be going to the doctor. This may be the symptom of something serious, and it MUST be looked into.
On the plus side, things that come on suddenly can also disappear just as suddenly!
Gentle hugs
As for getting her to the doctors, I agree with what ThePepperMan said. It was a progression with my mom mom, so this happening suddenly could be an indication of something and possibly treatable. Getting my mom mom to wear the diapers wasn't easy in the beginning, which is very common and understandably so. So your mom being told that she may not have to wear them after getting checked out may be enough incentive for her to go.
I hope it all works out for you and I hope you've been well. I'm always a pm away if you would like to talk, get support, or just vent as I know it's not easy. I know I haven't been here as much for some time now(which is due to me caring for my mom mom and D), but I think of you often. Love ya.
Her doctor gave her a sample bottle to take home with us for future testing.
I guess I should also say this isn't completely sudden in that she had bladder leakage before so I guess this is more of a progression. It was just sudden to me to see her lose complete control of her bladder a few times yesterday.
I hope it goes away suddenly, but I am doubting it. Unfortunately I think she has parkinsons which could be the cause and maybe dementia, but again she won't go to the doctor. *sigh* I don't know what to do.
Incontinence is a common part of the aging process, but sometimes it can be controlled, and yes, the proper pull-up disposable underwear helps a lot..
Hope you have some help and can get her to a doctor.