period help!!!!

So im almost 7 months postpartum i took birth control for two months for the first time ever. I couldnt stand the hormones any more so I stoped. Since then my period cycle has been 40,54,30 days and now this month im working on day 38. Before I got pregnant I had a very normal period didnt come a day late. Also I have rarely had sex with my husband and if we do we use a condom. Just havent been in the mood. Is this normal im freaking out because there is no sign of AF