Feeling super out of it on period?

Hi guys. For the past few years, I had been put on birth control to regulate my period. I had to get different insurance in October tho, and it wouldn't cover the birth control, so I stopped using it. Today, I went on my period again, and usually I just feel a lot of painful cramps. I didn't eat breakfast cuz I felt sick, and I nearly passed out a few hours after I woke up. Usually food helps me feel better, but trying to eat makes me feel like I need to throw up. Is it my period just acting up, or is it something else? Thank you!