Nothing in the world seems to help. I spent forever trying to find something to watch, but literally nothing felt good. Even when I eventually put something on it felt empty and I just ended up staring at the wall. I tried playing videos games, some of which I really love, and I turned them all off after a few minutes. I've tried other things too. Half the time I don't even eat. Time passes in slow motion, like some kind of purgatory. The worst is I can't even sleep. I have the next few days off and they're going to feel like an eternity. It actually scares me. How do you get through this? I'm desperate.
For what it's worth, I see a therapist weekly and I'm on a few different medications. This particular bout of sadness is caused by an especially painful rejection.
Move your body if you can, light to moderate exercise, even just going for a long walk is the absolute best non-medical treatment for depression. Your body makes a bunch of the feel good chemicals when you move that depression deprives you of. Also a change of scenery can help a lot. If there is a place you've wanted to go nearby like a museum or a park or something that can help you start to process and move on from a bad relationship end.
I live somewhere very hot so when I get like that, every other month or so, I go to a shopping mall and walk a few laps in the air conditioning and watch all the people. Your mileage may vary but walking around in places with a lot of people helps me.
It also might not hurt to talk to your provider about adjusting your medication if you feel like you are for more than a couple weeks. The most important thing to remember is that states like these are temporary, you have felt better before and you will again on the other side, you just have to get through it.