I’m confused

Can somebody tell me when I would have ovulated? I normally have a 35 day cycle but I’m on day 42 of my cycle and I still haven’t started my period. Me and my husband had sex the day before I was suppose to start my period and he came in me thinking I wouldn’t get pregnant. I have taken pregnancy tests but all of them are coming up negative so maybe I’m just testing too early? Maybe I ovulated the day I thought I was suppose to start my period? Anybody have any idea what could be going on?