trying to conceive. need tips/suggestions!

My husband and I are trying to get pregnant. I have been on birth control in the past since I am well known for being extremely irregular. I could go without a period for months at a time and not be pregnant. i took myself off my birth control in 2012 when my husband and I started trying. I got pretty well regulated until recently. now I'm back to square 1. we have tried everything but nothing seems to work. any tips or suggestions?