A GYN, and we know how much fun that is not, might make sense. This could have no relationship to T. It might, but maybe it doesn't. This could be a separate issue. The complication is that you are taking T. Finding a trans friendly GYN is something I might be able to do with the help of a fantastic trans center, but hard to do on your own. But still you have an ongoing issue. Certain conditions, like endometriosis have severe cramps as a symptom.
--Jay