Hi
Well I think since u was tipsy maybe u took it out and forgot to put another in, was there any sign of blood on sheets etc?
I dont think u can really lose a tampon up there cos theres no where for it to go, ur cervix would have to be very open for that to happen so Id think not worry about it
I agree with the other poster, there's nowhere for your tampon to go. Try feeling around for it - insert a finger and sweep it around your vagina. If you don't find it, you probably just took it out without remembering. But don't worry either way. You're fine.