Have you tried having sex?
Seriously, you're jumping the gun. Have women with irregular cycles conceived? Hell yes. Lots of women have irregular cycles. I've never been regular. I'll be regular for a few months or a year and then I'll go back to having a 6 week cycle, a 2 month cycle, a 3 week cycle, a 5 month (oops, has it been that long) cycle. I talked to my OB about it, and she said I just need to make sure I have a period every 3 months and gave me a prescription in case it goes that long again.
I've had 2 kids with no assistance from my OB. It took us about 7 months to conceive our youngest, but we were both really busy and not having sex as often as you would think given the fact that we wanted to get pregnant.
Give it some time. For the next few months, just have sex. You might be surprised! If after 6 months you aren't able to conceive, then ask your OB. An irregular period does not mean you have fertility issues. Just have some fun and try not to think about it :-)