Can I get pregnant in 8 th day of my periods plz tell me?

Yes. Yes, you can get pregnant actually on ANY day of your cycle. I typically tell patients that there are no SAFE days in a cycle. Having said that, some women can track their BBT and make assumptions about when ovulation is occurring, however, statistics are just numbers and pregnancy can occur during menstruation. My mother conceived me on Day #4 :)
Possibly . I'm guessing you mean day 8 of your cycle? Possibly as the sperm can survive several days and that would take you to mid cycle when you might ovulate. .