I had sexthe first day of my period, didn't use a condom, but i took the morning after pill 5 hours later, could an sperm still attatched to the egg?

Not likely: Intercouse during you menstrual flow (especially the first day) is not likely to get you pregnant.. You just have to be sure that it was infact a menstrual cycle. Bleeding can sometimes occur when women ovulate. So if you are confident that it was a menstrual cycle then it is not likely. To be sure do a pregnancy test if you miss your next menstrual cycle.