Trying to conceive. 2 years

Me and my husband have been trying to conceive for 2 years now. My periods were always normal growing up but as I got older they became irregular and some months I wouldn't even get a period. 3 years ago I had cyst removal surgery. I had 2 dermoid cysts. My doctor told me I was fine and that I should have no problem getting pregnant. But here I am. Everyone is having baby's or getting pregnant and it makes me sad. Not in a jealous hateful way. Just sad because I want children. Me and my husband are going to keep trying until the end of this year. If we still have no luck we will be seeking help. I'm scared that I will be told I can't have children though.