What do I do about the pain? [Details inside]?

I am experiencing the worst menstrual pain ever. My pain has extended to my back and legs. My calves hurt immensely, making it hard for me to walk. I feel nauseous. My pain has never gone this bad. Is this normal, or is there something wrong? I did search the internet regarding the pain, but found nothing useful to make me feel better.
I took a 400 mg ibuprofen . Made things worse.
What do I do?
(I think this question does belong to the General Section, but I posted it here because i know few people check that section out, well i know I’m one of ‘em.)