Trying to get pregnant!

Daschelle • Expecting rainbow 🌈 baby on December 22nd! So very excited 💖☺️
 Was on the Depo birth control shot for close to 9 months , got off and didn't have a period for 3 months , now my periods are irregular and it's super hard to track when im ovulating. Will start taking prenatal vitamins ASAP but any other suggestions? Could i possibly be infertile because of the Depo??