I REALLY want to conceive within this year.?

Ok... Plz don't judge. I am 24 & I'm so ready to have a baby. My problem is that in my teen years I was a little promiscuous so I would have problems with my periods. Either it would start too late, I would miss a WHOLE month, or I would have 2 periods a month. I never told anyone about it, not even my mother. So now that I'm older I really believe that I maybe infertile. I have been trying for about a year with my boyfriend of 2 years. He thinks that it's trouble on his end but he already has a duaghter. I am totally fine with that but I want to have one of our own. I'm the type of person who hates going to the doctor because of what I may find out. I'm Scared! Someone please tell me it's hope for me after all.