Hi everyone I am currently 28 years old and have been trying to get pregnant for about 6 7 years my husband and I tried one round of

<a href="">IUI</a>

and every month now we have just done timed intercourse I take letrozole to help me ovulate which seems to be helping because I am ovulating I have an ultrasound once or twice a month to see if I'm ovulating and I usually am I have really big follicles I just don't understand why it's not happening I try everything I can and it's always negative I do have PCOS but I've heard a lot of things that that does not matter I also take metformin if anybody has any suggestions I'm all ears