You need to see a doctor! Whatever's going on with you could get worse if you just wait. At least go one time to see a doctor, and then if something needs to be done think about what you need to do to get the healthcare that you may need.
visit this site to get some information. I still hope you see a doctor though.
Other symptoms? Could be hormones, endometrial issues, fibroids... How old are you?
See a doctor. Could be lots of things but better to know.
obviously by gender im far from an expert in such matters but ive heard starting some contraceptive pills can do things like this. I do hope you get a more qualified opinion however and wish you the best with resolving it. sure doesnt sound like much fun ;(
My daughter had this once, please go to the hospital and be seen, private message me ok?