Could The Pain During Sex And Irregular Periods Be Endometriosis?

hi, I am 16 I have been having sex for about 1 year now and it has always been so painful and I cant wear tampons either as they hurt as well and also don t no if is related or normal but when I have sex I can feel the penis when I touch my stomach and I can also feel my tampons if I feel my stomach when I HAVE to wear one, I also have very irregular periods and very heavy and painful periods, excessive hair, etc... I have been to my doctor and have been told that I have polycystic ovaries and could possibly have endometriosis also.. I would love to have a second opinion but I am really scared to go to my doctor again or another doctor as it was a very embarrassing experience for me and am not comfortable with it and took a very long time to go and see a doc.. I had sex 4 days ago with my partner of 2 years and was very painful as always and the pain still hasn t gone and also my vagina was a little swollen and has only just gotten better..... I really cant handle anymore pain, discomfort and I don t think my doctor has been all that caring or looked into what could possible be the problem that much.. I know I am only young and probably shouldn t be having sex anyway but I just really need some help and if I could get some answers that would be fantastic and It would be greatly appreciated !!!