I don’t know what’s going on


Ok so story is my period is over a week late. I am usually regular and maybe like one day off maybe two but never a week. I feel like shit. Nauseous, tired, insomnia, sore breasts, etc. I mean I drove all the way to work dry heaving today. Well I have taken like 4 tests all came up negative but I still haven’t gotten my period and I feel pregnant. Not my first I have two others so I’m familiar with how it feels. What I was wondering is what if I ovulated late or closer to my period. Would that mean I still wouldn’t get my period but my levels wouldn’t be high enough? Just wondering if this has happened to anyone. Thanks