Also want to point out that medication is safer and better regulated than supplements are, with a better understood side effect profile.
Absolutely. And for general info to others, bcp has far, far lower levels of hormones than it did 30 or 60 years ago, so when researching or looking for negatives, make sure the research is relevant.
Two starting points (not historical comparisons, but about options today:
Mayo
NIH
Also going to say that bcp can be easily found (and unlike in the past, covered by insurance) in extended formulations so you get quarterly periods rather than monthly - potentially a good option for those with severe pms/period pain. A doc can also prescribe it to be used on a continuous basis (no periods), plus there's norplant and similar.
Never had intolerable periods (though I have a high pain/discomfort tolerance so who knows), but quarterly formulations were awesome.
Echoing what people are saying for her to see a gyno.
I know that current day recommendations are starting later and going less frequently than when I was in my early 20s, but I maintain every woman should at least have a gyno and see them/get a pap as recommended once she's 18 (I think it's 21 now but whatever) and/or sexually active. But beyond the testing aspects, having a doc to ask questions is really important, especially when young/sexually active.
/mom out
Something that's surprisingly helped me with cramps was learning to stretch some of my pelvic muscles using a Theracane.
I have never seen one of these. I want one for my back - I've had knots on one trapezius an inch or two from my spine for decades, and it pulls other stuff out of whack in my neck and shoulder as I compensate away from the tightness/pain. I used to get regular 90 minute deep tissue and shiatsu massages (every single masseur/euse flipped out over how tight they were), and though it's much less a bother now than it used to be, it still gets annoying, and that thing looks better than trying to use the edge of a wall like some human cat or bear.
I found a bunch of trigger points that when I released them, felt a lot like period cramps. (I did this mid-cycle when I wasn't having cramps.)
Trigger points really really hurt when you first work them out, but after that initial pain, you feel a lot better.
@TV's Adam West tagging you in for the links. Please don't be nervous or anxious or shy (and encourage her not to be, too - please - she (you both) need to take care of your bodies and health!). Docs literally talk to people about these things all day, everyday. And there's nothing bad or "unmentionable" about what she's going through.
I'd recommend tracking symptoms for a month or whatever before seeing a doc and assigning level of discomfort or how much it interferes with daily life (and including sex life, if any impact) day-to-day. It sucks when you get in to an appointment and forget or wind up downplaying a real concern or how inconvenient it is.