Sex and neasuea

So my boyfriend and I were trying something new and we got anal toys and I had one in and he was in my vagina. Well it felt find but then after probably 30 seconds my uterus cramped like really bad to a point he could feel it and I got sick and ran to the bathroom to throw up. And I been cramping lightly now for a few minutes still getting waves of sickness. Anyone know what is wrong?