Chances of Getting Pregnant?

11-22-10 I got my first BFP after ttc for 2 years. We tried clomid, hcg shots and even an iui nothing worked. But after I lost 30 lbs (I have pcos) I got pregnant on my own. After I found out I was pregnant, I got my hcg levels checked and they were rising but not doubling like they are supposed to. It took 2 weeks before my doctor figured out I had an ectopic pregnancy. The embryo was lodged in the part of my tube that is inside my uterus which is much worse then being in the outer part of your tubes. I took the methotrexate shot and still have both tubes. Do you think I still have a good chance to get pregnant on my own again? It scares me that I wont get pregnant again since it took me so long in the first place. Do I have a bigger chance of losing any future pregnancies? I've had an HSG before and it was clear and also a saline sonogram where they checked my uterus and my doctor said that everything looked fine. How long do you think it would take for me to get pregnant again if ever?