Extreme Periods😞

hi everyone i need some advise.. for four years now i’ve had extreme periods, can’t eat can’t even drink water without vomiting and if there’s nothing in my stomach, just acid comes up, horrible cramps to the point i can’t move and if i do i’m vomiting because of pain, nothing takes away the pain besides sitting in a hot bath or taking a hot shower. if anyone has any advise or what this possibly could be please reach out to me, i’m going to an obgyn in about a week to finally see what’s going on with me 🙏🏽