Natkat,
my ex-gf was throwing up, having cramps, all the pains you describe, etc. She seemed often like a druggie going cold-turkey. (it's what some doctors thought)
Though I often got the feeling she liked to punish herself - she would never go see an endo for example, simply refused. It really sucks to watch all this period happenings and getting the idea as if it all NEEDS to suffered. Her not me.
When she finally got her hormones sorted out, the spook was over in a short while. Only that this lasted for so many years!
Never could shake the though that she hated herself as being a female (lots of other indications) - and there were reasons for that from her early youth...
The body and mind are a lot closer linked than what many will not want to know.
For this reason TGs may get this "hole in the tummy" feeling (me), and buckle with tear-cramps when GID has a bad go at you (me).
Hey, it's all in the mind... now just look what your body is doing!
Food for thought...
Axelle