How do I cope with so many deadlines all at the same time?

Priorize which one you do first, make a list of how many deadlines you have and what day, so you can see which ones you have to do first! And do take some time for yourself, like an hour or two between doing the headlines just to breathe and relax for a bit. Remember to hydrate yourself and eat properly! Take care of yourself, even when you have a million of deadlines all at the same time, You'll g through them with a good rest between them. I suggest you'd go for a walk between at least two of the deadlines, because it refreshes your mind.