Missed period

I had my daughter almost a year ago. I got my tubs out about 8 months ago and stared getting my period about 3 months ago. It was regular ( got it once a month for about 5 days each time.) but this month it never came( my husband and I have unprotected sex ) I have my tubs out so we aren’t worried about babies, I just want to know what’s going on 😭