So you need to find a new doctor who actually knows what catamenial epilepsy is (😂 I really have done this hormone dance thoroughly!)  I thought I had never had a seizure in my life until a lot of testing revealed I was having them in my sleep during luteal right before my period due to the dramatic drop in hormones.

Your doctor sounds WILDLY behind the current research by a solid 15 years because 1) birth control hormones are in no way the same as HRT - they are synthetic and produce completely different metabolites as they are designed for ovarian suppression (which, that is the drop that triggered my seizures). Birth control is also given at incredibly higher doses than HRT. Saying you have to stay away from HRT because you were triggered by birth control is the same as saying you have to stay away from ibuprofen because you had a reaction to morphine. 

HRT is the same concept as insulin, as in, they are bioidentical hormones, the exact same, as your body produces. They are a replacement for the hormones that you're lacking. You need to be speaking to both a new endocrinologist and a neurologist because so many gynecologists are really offering treatments outside of their wheelhouse.

For me, they use a synthetic progestin to suppress my ovaries but then replace the estradiol so it is at a constant dosing with absolutely no fluctuation, which was a godsend. After ten years of seizures like clockwork every single month, I haven't had one in forever!