Irregular periods

Ana • 2e been married for 4 years, ttc for 18 months for baby #1 💕💍💑🍼🍼
I have always had irregular periods like 3 or 4 periods a year, i had the mirena for 3 years and had no periods for that period it got embedded on my uterus and got surgery to get it removed i had a ultrasound and dr said everything looked normal, i was placed on the patch for 8 months and had my period every month. I had my last period sep 24-28, didn't used the patch the month of October I ovulated on the 13 and bd  the 12 and the 14. Af should of come the 24 of october and nothing, I had pink discharge right after sex on 03/11 have been taken a lot of pregnancy test and they are all negative, i got my blood test back on 06/11 and it was negative I haven't had my period all last month and this month so I scheduled an appointment with my obgyn for an ultrasound on 16/11 do you guys think theres any hope for me if i wete to be pregnant I would of have been 6 weeks i have heard stories about women finding out until 10 weeks pregnant.