Can having sex on your period throw off your cycle.

Feb 13th 2021 I got my period late that night at 10:45pm spotting until the next morning

Feb 14th I had full blown bleeding. My husband and I had sex that night.

Feb 15th I had full blown bleeding. No problem.

Feb 16th spotting all day

Feb 17th spotting all day barely any blood

Also we had sex a day before (29th) my ovulation and a day after my ovulation (1st)

My period came so late in the day I had thought I was probably pregnant. My back was killing me and my breast felt heavy.