Odd periods after sex

BabyDinoMom
Any one have issues getting periods on time after u started having sex? 
My husband and I got married this past year and ever since, my periods have been completely off. In the beginning they started to last longer than normal, for about 3 months my period started coming and not stoping for 2-3 weeks. Now, my period hardly wants to come. The last couple months I've been late.. Like a month late. Couple months before, it was 3 months late. Could internal ejaculation (besides getting pregnant) mess with your periods? Before we were married, he didn't ever internally ejaculate. I test regularly so i know I'm not pregnant. Any advice or facts help, thanks!