Burning after fingering

Last week my boyfriend came over and he rubbed my clit And kinda fingered me he couldn’t go all the way in because I was on my period he just played outside of my vagina and the next day I noticed a burn when I would pee and a sense of urgency but it went away after a little bit I asked if he washed his hands he said yes so I just thought it was because of my period because I’ll have days where it burns because of a change in pH . But Friday we did it again and he said he washed his hands twice this time before he fully figured me and played with my clit and ate me out but it’s back I don’t know if he’s just doing it to hard or if it’s a uti.