I was ebf my sons for 4.5 months but had to start supplementing with formula because my milk wasn't fatty enough and now my son is completely weaned and on formula.

I haven't breastfed at all (except a few times here or there when my boyfriend has during sex- dont judge.) for a month now and I still haven't gotten my period back, should I be concerned I am pregnant again or does my body just need longer to balance back out?

Thanks in advance!!