Just because you have irregular periods doesn't mean you won't be able to get pregnant. I wouldn't stress over that too much. I felt like I was the queen of irregular cycles and have two healthy kids.
Sometimes we're irregular for no reason at all. On average, based on the numbers you provided, your cycles are about 41 days. That's not too far off the stated average, granted it's on the high end, but still. An average cycle can be 24-36 days.
As long as you are still have a period, albeit, irregularly, I'd say you'd be okay. However, if you feel that you need to get a second opinion, you always need to do what feels right to you.