I m 22 virgin. is it normal to have a pink ball/spongy round tissue covering the entrance of vagina?only a small hole can be seen right down.

Sounds like a hymen: If a woman has been looking at her vulvovaginal area once or twice a year with a mirror, and it has always looked the same since high school, then that should be her hymen. That means every woman should look at her genitals with a mirror, and be able to identify all her parts. Also, if she pulls her labia (lips) outward, one labia with each hand, the center hole in her hymen should look bigger.