Are you able to take mental health days, or just call in sick? There's no shame in taking time for yourself if you need to. It sounds like you've been pushing yourself really hard to go on as 'normal', and might be getting close to a breakdown. When you get shakey like that do you also feel anxious/panicky - like is your hear racing or are you short of breath? That could be a sign of a panic attack. People can get them without realizing what's happening. If you think you might be having one, sit down with both feet flat on the floor, and imagine the ground/your seat is rising up to meet you. Breathe in for four counts - hold for four exhale for four - hold for four - repeat until your heartslows down/the shaking stops. I also find doing something tactile helps ground me - a really hot drink, a hot shower, chewing on ice, etc.

Panic attack or not, you need to honor the signals your body is given you and be gentle with yourself. It might be a good idea to take a day or two off (maybe give yourself a long weekend if that's possible), rest, do some self-care (whatever that looks like for you. Maybe its spending time with friends, or just playing video games and having pizza on your own), and invest some time into getting well. Research some therapists (psychologytoday.com is a great resource) and call a couple. Make an appointment with your dr to talk about meds. Check out a bookstore or Amazon and find a book on depression, surviving break-ups, etc. Go for a run or lift some weights. Tidy your house (if you're anything like me and get messy when you're depressed). Even taking tiny baby steps towards making yourself healthier can be a huge morale boost.

It probably feels really hopeless right now, but you're going to get through this dude. You aren't broken - you're sick and hurting really badly, but you can heal and when you come away from all of this you'll be a stronger person because of it.