Can’t seem to get pregnant :(

Looking for advice. We’ve reached the year mark of trying. My husband got his sperm tested, it looks good. I’ve had SO MANY labs drawn, everything checks out on my end. I have a child from a previous relationship so I know I can get pregnant. Next step is to get some procedure to make sure my fallopian tubes are open. I’m sure that will all check out too. I’m at a loss for what could be wrong? I ovulate each month and use the test strips. We have sex frequently both before and after ovulation. We take vitamins. Any advice?

* talking to my doctor about starting clomid (even though i ovulate ?) during my visit for the Fallopian tube check