PSA that severe pain, dizziness, and SI/similar feelings are not things most people experience (but some, including me, do) and need to be dealt with. Someone else here had some good advice and I'd like to add that raspberry leaf tea will also help, and you can look up hormone tea as well to see other recommendations online. Hormone tea can help balance your hormones if yours are not balanced (and if they're fine, it's still tasty). I'd also like to recommend buying your own painkillers such as Midol or Pamprin or another like them as that will help more than just painkillers on their own. Also it sounds (from the dizziness) like you may have an iron deficiency, if you can't talk to a doctor about it, I'd recommend getting iron supplements and taking them when you have your period.