Overweight + No Period + chance of PCOS = No baby?

Hey all, my name is Amanda and I am from the Philly, PA area. I am 23 years old and have been married for a year. I have a question. My husband and I have been trying to conceive, but I have been unable to get pregnant. I very rarely get my periods, and it has always been irregular since I have had it. I am also approximately 100 pounds overweight and smoke (Even though I don't smoke much and I'm quitting ASAP). When I was younger (in my teens) my mom made me get two abortions at 16 and 17 years of age (I was significantly alot skinnier, like 180-190 lbs) and then at age 19 I started to get symptoms of PCOS even though I was never officially diagnosed. Will I ever be able to get pregnant? Have any of you ever had these same exact issues, but overcame them and was ultimately able to conceive? I would go to the doctors but unfortunately at the moment I am unemployed helping out a sick relative and I am unsure in how much it would cost for a visit. I would appreciate any sort of feedback in how I can change to increase the odds in my getting pregnant in the future. Thank you!