2 kids, ttc, and scared i cant get pregnant again :-(

I have 2 kids 3 years old and 18 months. Me and hubby are ttc but i cant shake the feeling that i wont get pregnant. Ive tried talking to him and my mom and they seem to think I'm overreacting and i need to stop worrying. My pregnancies were rough and i gained a lot of weight and im thinking maybe thats why i wont be able to get pregnant again idk. just needed a breather i guess any advice appreciated tia

are you still showing signs of ovulating? Don't fret mama unless you have hard evidence that you can't have any more. It'll be ok  

My period is irregular so i never know. I had my son in july 2011 and didnt have a period until last month i have a dr appt wednesday though

I noticed you live in LA. Not far from me! From the looks of it you seem to be able to get pregnant pretty good. Your children aren't too far apart but I understand your worries. I worry about it too. I have gained weight too since I got pregnant in 2011 but it was like 5lbs. I'm trying to lose that plus more right now because we've been ttc for a year with no luck. We're going get tets done next month since I'm convinced we won't get preggo this cycle either. My daughter is 13, my first son is 5, and I got pregnant with my angel son Sep 2011 and mc Dec 29th. So my kids are really far apart which scares me because it makes me think I'll have to wait another 4 years before getting preggo again judging by the age difference of my kids. I hope you get some good news from the doctor though. Maybe they can help you regulate your cycles. Have you tried something like a natural supplement to help you with your cycles? They say fertility blend is a great supplement that helps men and women conceive faster.