My life should not be this hectic 🙄

I've recently just become a vegan but prior to becoming vegan, I already had a pretty healthy lifestyle. My periods are usually 4-5 days, heavy (must use super plus tampons) with cramps. This period started last Thursday. It is now Wednesday and I am still heavily bleeding. The first 2 days were extremely light. The 3rd day was super heavy.The 4th & 5th day were normal bleeding. The 6th day was normal and then light. The 7th day (today) light then heavy again. Im also having these stupid annoying pinches near my ovaries. It literally feels like someone is jokingly pinching me every now and again in my pelvis. I'm not on birth control, I don't have pcos, a cyst, or endometriosis and I don't have irregular periods like this so what could be the culprit? Whenever I've adapted to a healthier lifestyle in the past, my periods became lighter, not more hectic!