is this a yeast infection?

so i started seeing this guy and we have had sex twice. the first time we did was my first time, he couldn’t even put it in all the way. the second time he just went wild with it honestly and the day after, my vagina opening hurt so bad i’m sure it’s just from really doing it. we DIDNT use a condom which i know is really dumb

now it’s been like three days later and my vagina opening is so irritated and itchy a little

there is discharge that’s like milky white and sometimes yellow-ish but it has no scent. it’s definitely an abnormal about of discharge though

is this a yeast infection or something else?

i’ve never had a yeast infection, i am on birth control and i’m supposed to be getting my period this next week.

no judgement please!! i’ve never had a yeast infection or UTI or anything so this all is new to me and i’m aware sex without a condom is dumb!!