S.
I couldn't stand not having a regular period when I was breastfeeding and my doc told me it could take months to come back, and you do not want to be freaking out thinking you are pregnant all the time. I'm not sure if it would work with your meds, but I took a progesterone only pill, but I think that it only works if you are still breastfeeding, so it probably wouldn't help you. Just know that it is normal for it to take awhile, and it will come back, nothing is wrong!
S.