i can't get wet

so whenever my bf and i have sex the first time we see each other it's great, like we both come and it's amazing but lately we've been trying to go for seconds like 2 minutes after finishing and for some reason i cannot get wet for the life of me. And it's weird because i do feel turned on but i guess my vagina doesn't and we can't do it. It's super frustrating for both of us so i'm wondering if this has ever happened to any of u and maybe some tips/advice?? thank uuuu