I echo what Sky said. I am not a professional so I am by NO means qualified to say, but it certainly sounds like PTSD to me!

Healing from PTSD is very complicated. For some lucky people, it happens quickly (although not painlessly or effortlessly). I had a roommate who only needed a few months of therapy to deal with her PTSD. But for some people, it's more complex and the healing doesn't happen quickly. There are some people here who suffer greatly, long-term. There is a LOT that goes into recovery from PTSD.

I strongly encourage you to seek professional help. I can witness to you that it CAN help a LOT to get the right therapist in your corner.

Best wishes,
Angela