panic attacks

I had a traumatic experience a few months ago. I took it surprisingly well but a month or two later I started showing symptoms of PTSD. I know I need to see a doctor but honestly I'm embarrassed. I know it's not my fault but it seems to be getting worse. I space out, have sudden flashbacks, burst into tears, and worse of all painful panic attacks.. they physically drop me to my knees, I can't breathe, my body shakes, and my chest POUNDS. I dont know who to even go to. My obgyn? A therapist? I'm so unsure. I don't want people to think I have problems or something and won't be able to take care of my baby. Idk everything is against me and i just don't know what to do.