What Causes Difficulty In Getting Pregnancy In Women With Irregular Periods?

Hi I'm TTC and I have no luck. I was on BC but I stop taking them in the summer of 2013 still no luck my periods is irregular so I don't know when I ovulate and I don't think I can ovulate or get pregnant. 25 years old I think I'm going through menopause or something . My boyfriend say im too dry. I'm stresd and I don’t know what else to do. Please help