Everyone loves a hero. Honestly, if you can see the silver lining in your situation - i.e. having PTSD made you more appreciate of a potential career in Psych for instance - they will applaud you for being so "brave." Trust me, I rock my battlescars as badges of courage and they + my lady parts and disadvantaged URM status (plus the killer grades and MCAT score I will bust my ass to get) will ensure acceptances across the board to anywhere I choose.
Look, suck it up buttercup. I know you can find a way to look at the silver lining. In fact, go watch Silver Lining Playbook or read the book. Then reflect on your life situation. Draft a personal statement about why medicine, why now, and why YOU. Read it over and over so it becomes talking points. Make up some potential interview questions you think they'll ask you. Better yet, have a friend/mentor do a mock interview without giving you a clue about which questions he/she will ask - attend said mock interview after you've already programmed yourself to address the health issues via writing down an informal statement of purpose for yourself. Brainwash yourself into believing your health issues made you a BETTER applicant because you're going into the HEALTH field. It's not just all about numbers, or ECs - people have various LIFE experiences, for better or worse.
Change your attitude, change your life. Believe in yourself. And breathe. If all else fails, pop a Xanax before the interview so you won't have a panic attack during the interview. I take Klonopin occasionally for those god-awful moments I never let anyone witness...
Be a tough cookie and you'll win respect and admiration (and admission). Just my two cents. Oh, and listen to other people on here with more experience. But also DON'T listen to those who try to steer you away from good schools or say disparaging though well-intentioned things regarding your potential. Negativity can be contagious.
It sounds like you are making excuses for not having had past experiences - they might wonder if PTSD is not something that goes away, how will you ever be able to take on the rigors of a medical education? Maybe some deep soul-searching is in order.
Give me a lemon and I will bake you some lemon bars...my biggest advice to you is to learn to do the same. After all, how can you help others if you cannot first help yourself overcome (or cope with) your own issues?