low sex drive… help

my sex drive is really low and it’s frustrating for me. I don’t know what happened because I was fine and then slowly I started feeling less of that drive. I don’t even feel like masturbating and when my boyfriend kisses me I don’t really feel turned on or anything. we tried to go slow and more sensual this time around for the foreplay and it was rlly good but then when it actually came down to having sex, it was good at first but then I no longer had interest. it just didnt rlly make me feel all that great and i always have pain when having sex. i think that may be the problem. what do u guys think? what are some tips and ways to fix this?