Clit pain and orgasms

I’ve masturbated before but I don’t think I’ve ever been able to orgasm. I feel extreme pain and have overwhelming anxiety whenever anything goes into my vagina (even tampons). When my boyfriend does either oral sex or stimulates my clit it starts to hurt very soon after we start. When using a vibrator it doesn’t hurt but after a bit of time it stops feeling good so I stop. I don’t know what’s wrong with me and if these problems are related. Does anyone have advice?