Girls, hi. Maybe someone has encountered such a problem. Pregnancy is …

Girls, hi. Maybe someone has encountered such a problem. Pregnancy is 13 weeks, feeling normal all week, but for six consecutive Mondays I feel nauseous to the point of vomiting. I don't know how it's connected, but toxemia comes to me only on Mondays, on other days I'm really alive, even if there was any hint of toxemia... Already starting to be afraid of the beginning of the week???