your in finals week which is a massive drain in its own right. the sleep deprivation and stress is most likely a factor. the 'moreso now' could be a result of a long school year and it's just affecting every part of your life. the empty shell could be more of a disassociation defense in order to combat overwhelming yourself.
some of the best tips are the simplest overlooked. what's your diet like? sporadic eating when you can? are you giving your body the nutrients it needs? a healthy mind needs a healthy body.
the sleep problem is tricky because of the time frame. but when you can study methods of sleeping to improve yourself for the future. meditation, late night eating restrictions, sleep music.
colleges goal is to put you in a stressful environment simulating the rigors of your profession. the best defense is demanding a positive attitude, visually see the goal in front of you and rally yourself from within. Focus with determination in not only reaching the goal, but excelling. 99% of our mental issues are how we think. if you think your tired, you make yourself more tired.
if you feel empty (what your saying is what I call the 'co-star' thinking, where you are only a co-star in your life and not the main character.) find identifying traits that single you out and make you unique. skiing, drawing, singing, crocheting, dancing, and on and on and on. its not an 'empty shell', it's a house in which some of the rooms you've turned the lights off to conserve energy for the study and college...time to re-discover some of those wonderful rooms in your heart and be the star you are.

Thank you that was pretty helpful. I do need to work on my health for sure. Luckily my boyfriend has agreed to help me exercise and make better choices and he's gonna do the same with me. It'll probably help me not doing it alone. Hoping to work on myself soon and focus on who I am.

That's themost important thing. Do it for YOU. You are worth it. You matter. It is only successful if you do it for you and no one else because in the end you are the only one that will make you happy

Hi. I agree with @Kingsolomon66. Feeling overwhelmed can be a big deal and have consequences that we can't foresee. I think the dissociation could be a result of this, too. When I have a lot of stress, I try to exercise and eat well and do things that I like to do during small breaks from the things I have to do. This summer I was studying for a licensing exam, and during study breaks, I would take a walk, or have a snack or work in an adult coloring book. It was like a reset for my mind. I couldn't sit and study for longer than 1-2 hours. I had to have breaks throughout my study time. It helped me to feel refreshed and able to concentrate again. I hope you find what works for you. Best wishes in working on your health. I am so glad your have your boyfriend's support!

Yes I have been there it is usually when I am stressed. We tend not to breath deep enough when we are stressed or anxious. Taking a deep breath and relaxing. Reminding myself this will pass also seems to help. I pray this finds you rested and more yourself. -Rachel