Fear of the doctor

IM a grown adult woman yet I am completely terrified of the doctor. I am also a hypochondriac.. every other day I think something is wrong with me. When I start googling of course I just always end up with cancer... it took me until I was 27 (to go to the DR in general, hadn't been since I was 17) to go to the gyno for the first time even after being sexually active for over 10 years. That experience was so traumatic to me. I don't understand the fear as I never had something horrible happen to me at the doctor as a kid. I've been really worrying my self about what's wrong with me now. My periods are off, I'm always tired ,everything hurts... maybe it's just in my head but any advice as to how to get more comfortable with the idea of going to the doctor??? I don't even know like how I would schedule for "I think something is wrong but I don't know what" sigh. Any advice would be appreciated.