What is wrong with me

I have two children prior to my husband, but he has 1 as well. We have been trying for 15 months. 10 of them have been in the right time. I know I ovulate, we know his Semen is good. Why. Can’t. I. Get. Pregnant. We were supposed to go to the infertility doctor but we’re having stupid health coverage issues because they said I didn’t need something then the day it was due decided they needed it and I didn’t have it. I had to reorder it. Anyway what is wrong with me. Will I ever get pregnant. Anyone perfectly fine both of you but take over a year to get pregnant. I’m breaking down mentally