I guess this is really two subjects...
As for period questions, I cycle, even though I don't bleed, so I just say, yeah, a week ago, or whatever. Yes, bitchy and weepy as per normal lol. Ok ok, I dont add that.
As for being read as the correct gender or however you'd put it....several years ago, I was still not cnfident enough to go out unless I did major make-up, etc. So, it got annoying, if I just needed something from 7-11. Well, one day I ran out of dog food and just didn't feel like going to all that bother just to go get some Alpo. So I put on an old baseball warm-up jacket that was balloon-y enough that it hid my breasts. And off I trotted to the store, bare-faced and wearing jeans and this baseball jacket. Well, the guy behind the counter still called me Ma'am. Woohoo!!!! That was a turning point for me.
Stealth
PS--I've never worn that jacket again except to do yard work in the fall.