I did something really stupid...

I filed for divorce from my abusive husband in July... Divorce is not final but he had been being nice again and I did the deed with him a week after my period ended last month... Now my period is 3 days late this month. I feel so stupid because all he wanted was sex and now he's back to being his crappy self. I haven't taken a test yet because I'm in total denial mode. I already have 6 kids my "baby" will be in school next year.... Please don't judge my lapse in judgement I know I need to make an appointment to go get this checked out I just need some moral support