I haven't read everyone's responses yet but wanted to chime in as someone who is also dealing with simular issues. Yes, get thee to a doctor soon BUT I get that its also a stresser to go to a doctor...especially a new one. I always avoided going to the doctor because I was afraid of breaking down. But put that aside and do the following. Easy and you can do it RIGHT NOW.
Deep breathing. Deep breaths right down to the base of your spine. Go for a long walk (and breathe deeply while you walk). Walk with long steps and arms swinging. And breathe. Keep walking until you feel those good post-exercise feelings you get after working out. Increase your intake of Vitamin D....soothes the nerves especially at this time of year. Eat some good food.
And the second part of this process: acknowledge to yourself that you have been through hell. But that part of your life is over and you are ready to move forward. Its OK to acknowledge that you are messed up over that experience. Its OK to be a mess! Don't fight your emotions. They are valid and you are messed up for a very valid reason. Don't try and ignore those feelings. Its all OK. You are in a PTSD phase right now...and that's OK. Don't fight it. Acknowledge it. Feel confident that you are working through a process and this is all part of that process. And that's OK.
I have a lot more stuff you can do but these little things have really helped me get through some tough days. Yes going to the doctor will help but you can do stuff yourself to take control of the situation. Good luck...it's all going to be fine