Irregular periods :(

Lee • Mommy to 3 year old girl! Baby #2 joining us March 2016!!!
So I got off the pill in April and my cycles were 28 days, 30 days, 26 days, 40 days. I'm now on CD41 of my next cycle! I got on the pill at 18 and stayed on until we started trying for #1. (It didn't take long so I didn't get to see what my cycles were really like.) My cycles were all over the place after that but I was breast feeding and  then I got back on the pill. 
​I am 5'6 and weigh 130 so I don't think it's a weight issue. I run 3-4 miles a few times a week. I eat very healthy (lots of fruits, vegetables, hummus, etc) and occasionally indulge in light drinking. I was taking a multivitamin but have switched to prenatals. 
​Has anyone had crazy cycles like this? Any luck trying to conceive with crazy cycles? I just saw my Dr in July but my cycles weren't crazy yet! Should I go back?