TTC at 42

Lorena
Hello everyone! I'm 42 and we are TTC our 3rd child. I have had two miscarriages and one interstitial ectopic pregnancy. The first miscarriage was when I was 28 then at 29 I got my second child. Then I had the second miscarriage at 35. Then at 39 I had an interstitial ectopic pregnancy were I lost a tube. This time we are actually planing and preparing. My dr put me on prenatals and told me to check my bbt and cervical mucus daily. We have been trying for three cycles including the one I'm now. I have had cyst on my ovaries two or three times the last couple of years but they have resolve on their own. I'm currently 9 days late but my periods are irregular now since the cysts.  I took a pregnancy test last week and it was negative. I'm starting to get frustrated and I'm fearing that we waited to long to start trying again. My doctor told me to make an appointment by January if we didn't got pregnant . Any advice from you ladies before I see my gynecologist on January.