Not getting pregnant

My husband and i have been trying to get pregnant for almost 2 years, in novemeber i had a canatlope size cyst removed off of my fallopion tube and the tube was removed also. The dr started me on metformin 1000mg a day, i was wandering if anyone has taken it and if they got pregnant n bow long it took...? Also while we are having sex i feel like nothing is going inside me as when i clean up i feel like the mess is on the outside when he was clearly in