I was drunk one night and i don't remember if i took the tampon out.would my partner have felt the tampon.if not how far did it go.?

Yes they Would of felt and seen the tampon. Although if your partner was also intoxicated then he may of not felt it, but it would of stopped the penis from going a mere 3 inches in your vaginal opening. And also it can not be still in there if it was in the first place, It wouldn't of went far at all during intercourse, therefor if it was still in your vaginal opening you would be able to see it and/or feel it.