This will pass, it'll suck for a while, but it will pass. Hold off on making any lifechanging decisions for a few days at least. Try to notice things in your life that you are thankful for. Even small things, like having a comfy chair. Is there anything that comforts you?

Are you stressed about the trip at all? Can you break it down in your head, make it more manageable? Put some plans in place to get through it.