Does Nuvaring Makes A Painful Menstrual Cycle?

Hi, I'm on NuvaRing and I have been on my ring-free week since this Thursday, February 3rd. When I finally got my period this Saturday, I felt fine, until about 11 at night, I started feeling very nauseous. Later that night I woke up feeling 10x more nauseous now with bad stomach cramps. This has continued since then. There are times when it feels a little better, but sometimes the cramps are so bad they make me want to throw up. When I move around they almost always get worse. I've also been swallowing a lot of mucus lately due to congestion. Do you think this is NuvaRing making my period worse, post nasal drip gone haywire, or something else entirely? Should I go to the hospital?