I had sex with wood be on febraury 17th. on feb 28th i took regestrone 5mg for five days . still period is not came why?

Check for pregnancy: check pregnancy test first, just in case now and in a week. Otherwise, you may have a delay due to hormones in whatever you've been using

Two possibilities: You don't mention if you were on a reliable contraceptive on 2/17. If you conceived, progesterone would not cause your period to come on. Even if you didn't conceive, the period won't come on while you're on the progesterone. It would start 2-3 days after you finish taking it.