Birth control used to help conceive?

My husband and I have been ttc #1 for almost 9 months(and we try at least every other day). I have an irregular cycle so the doctor is talking about starting me on the pill for 2-3 months to make it regular. Has anyone ever heard of this before? I also for the first time in at least two years had cramping and cm shortly after af ended, is this a possible sign of ovulation? I have three different apps that are giving me three different dates for possible ovulation and different dates for when af is due. I want to test, but don't know which day to go off of!! Any advice would be greatly appreciated!