Annoying mom

So, my bf comes over alot more than I go over his house now. & today my bf bought me AND my mom food, & I decided to eat in the dining room instead of my room bc it was too hot to be In my room, & I'm very open with stuff & I'm very comfortable with my bf that I can be myself & not care how he acts. & out of no where my mom has the nerve to talk bout me "being rude" & "not having manners" - btw I just got my period today & I have bad cramps, I'm hot, bloated, & very irritables- & she's talking bout "would you act this way at his house" & I don't even say anything to my mom bc If I "talk back to her" she'll auotmatically get mad & I hate dealing with her shit. But obviously I know I wouldn't act how I do at my house at his, but I'm at MY house, I'll act however I want, & for the record, I wasn't being "rude" & I wasn't acting In anyway to have my mom "judge my manners". We were done eating & all I said was I'm on my period & blah blah like ?? my mom Is so annoying. I'm not really looking for advice, I just needed to rant to you girls & just vent to make myself feel better. So I got up from the table & went to my mom & was like "I'll be open all I want bc I'm In MY room" can't say shit bout it now. Like, my mom basically told me to not be myself with my bf like wtf?? Just bc you're so quiet & boring doin't mean I have to. I know when I need to tone it down & this was definitly not one of those moments. Well, thanks to anyone who took the time to read my rant. I'm feeling a lot better now.