Why can’t I get/stay wet?

Last night my boyfriend fingered me for the first time. Usually when i masturbate im not wet, like it’s really hard for me to get wet. When he started i was wet, but it didn’t feel like anything, and it didn’t feel good. Just like a finger was in me. and then after a minute or two i wasn’t wet anymore and it started to hurt. Why can’t i stay wet/get wet? i wanted him to do it, and i was turned on until it started to hurt because it was just a little uncomfortable. Is there something wrong with my vagina?
Why can’t I get/stay wet?
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