I am going to have donor egg ivf. i had buserelin 5 w/ks. since i strated progynova a week ago my pelvic triangle feels very tender. is this normal?

Maybe not: Progynova is a pro-hormone for estradiol, which is the main natural sex hormone in women. There is no clear reason this medicine should cause pain of any kind, but some reasons why it might. Have you asked this question to the ivf doctor(s) you are working with? A doctor who knows you can likely give a more helpful answer. In my view, "very tender" may not be normal.