i had sex with a man after being a lesbian my whole life

i’ve only liked girls until now and i’ve had a few girlfriends. but i never let them touch me while having sex. i fingered them or ate them out but i hated when they did it to me. i even thought i was asexual. it wasn’t really a problem bc most of my girlfriends were pillow princesses. now i have a boyfriend for the first time and we tried to have sex. when he tried to put his penis in i started crying, i’ve never felt that much pain in my life before. we tried a couple of times on different days but it’s always the same. it hurts too much. i can’t stand it even for two seconds. i know it’s not physical bc i can finger myself without hurting, i just don’t like it. but when he tried fingering i started crying again. i don’t know why it hurts and i don’t know what to do. does anyone have any advice?