How can i overcome ptsd without medications or a professional therapist?

I don't advise it.: If you feel you must go it alone, read everything you can about it. Most people don't know they have ptsd since it can mimic major depression, bipolar disorder, intermittent explosive disorder, even ocd. I would advise you to get professional help and not try to go it alone. It can be a very serious disorder, even fatal.

The point is:: You don't need to! everything is easier to do with help. For instance, this web site. It takes a lot of people to make this work well and this is much less complicated than ptsd.