can anyone help me or have i accidentally screwed myself over?? :(((

i was confirming my age to be able to look on facebook market place and by mistake i’ve accidentally clicked on my bfs id instead of mine (i had taken pictures of both of ours for an earlier booking). i didn’t notice until today where it changed my birthday his. i then tried to change my birthday in the settings but it keeps on coming up with “something went wrong. please try again”. is there anything i can do or do i just have to leave it??