I had unprotected sex with my husband right 3 hours before my periods, and after 6 hours i took 4 tablets of famila 28 (active pills) and than after 12 hours i took more 4 tablets same of famila 28, now am i protected against pregnancy or not?

I had my periods started right after some time i had unprotected sex and its 12th day that my periods are going on.and i am bleeding daily as in normal periods. in the begining days of these periods i was having clottings just and no bleeding for 4 days. here i tell you something important that i had an abortion 2.5 months ago.is there any risk of pregnancy? and is it normal to have such a long periods? Kindly assist me.