Opinions needed, sorry kind of long

Adriana
Would anyone know reasons of spotting that are not caused by ovulation or implantation. I have had my period since I was 9 and never had spotting in between periods. I got diagnosed with pcos at 19 and this is my first month ttc #2. .. I don't believe I'm pregnant this month as I'm waiting for my blood work from my annual. I have a love hate relationship for my obgyn. I dont trust no other doc with the delivery with my children but I hate him because he brushes most things off and says I worry to much, I'm sorry if I've had my period for 17 years and this is the first month I'm spotting I would like to know possible reasons and be checked into why it's happening .. Am I right? Or should not worry? He said its due to cervix being sensative. Ok, understandable but it's never happened before and coincidentally the first month ttc! It happened 3 different days. March 6, 8, then 13th. once when CAREFULLY checking cervix postion , once after sex, and once randomly.. All very tinyyyy amount . Any thoughts?