Just trying to pull out what I hear you saying -- that maybe you are leaning towards an answer without realizing it (if that makes any sense )
You've told no one. See no benefit in doing so. In terms of telling to explain your behavior, you say you don't think it's worth the price. You don't want her or anyone to think xyz because of BP or the meds. (You can't control that of course, and there's no way to know.)
I don't see why your mother would be an exception to your general feelings about it on account of one incident. The incident might be out of character, but really? It's not that big of a deal (imo). Brain farts happen. (You don't mention exactly how recently this happened, but as you mention current hormones, perhaps that is a factor in making you feel extra sensitive about the mix up?? Just a thought.)

You're still quite new to the whole BP thing and maybe you want to see if your feelings on disclosure change or stay the same with some more time. There's no rush.