Period Help

Usually my periods are very light, normal, never have any problems, but this time I'm losing a lot of blood, and it's a lot longer than usual. My stomach cramps are so severe, like I've never got cramps in my life and sometimes I feel like I could vomit, very bad naeusa. My boyfriend came inside of me twice prior to this period I have got and I google as to what this could be about and it said an early miscarriage? That can hardly be can it?