Did she believe my story??

(i'm a girl btw) This happened a long time ago but i just can't seem to stop thinking about it. i know this is weird but i was masturbating in my room one day and all of the sudden, my mom knocked on the door really quick and walked in. before she got in, i went to stand up but my pants were still down. i told her i was changing my pad because it was my time of the month. and i actually do that too. she knows that i always change my pad standing up in my room and i've been doing that since i was young so it wouldn't have seemed odd for her not to believe me. but i'm not sure if she did. Right after, I asked her for extra pads because I was about to run out. I mean, she's seen me change my pad in my room before. And she does similar things where she powders her underwear that she has on in her room instead of the bathroom. Do you think she believed me?