Short-term, period-regulating BC?

Karen
Background: I was on the shot for 6 months, then the pill for 4 months, IUD for 4 months. I got it out in February and have been using condoms since then. I've only had 2 periods since then.
My husband and I are wanting to start trying in a few months, but until then, I need to try to regulate my periods so I could actually get pregnant...any ideas for short-term, period-regulating BC that I could try?
Any input is appreciated! Thanks! :)