I had a unprotective sex.. bt sperm didn't enter.. bt to be more pretective I took pills...
After a week I had period.. bt again after 11 days I am having period.. when I searched in net it only showed abot pregnant.. so now I'm afraid that am 1 pregnand or this bleeding is just because on 11 day I had danced so heavily..

Dancing doesn't cause vaginal bleeding. Sex does.

You took the morning after pill? That tends to cause irregular bleeding.

If you aren't prepared to be a mother, stop having sex ax there is no form of birth control that is 100% effective 100% of the time.