Chances of getting pregnant if i lost my virginity during my period

It's impossible, so don't stress out about it. Just have fun!

You did all the right things, so I wouldn't worry. What made you take the morning after pill if he wore a condom? did it break at all? as long as the condom didn't break then your fine, as no ejaculate got inside you. So don't worry about having to take plan B unless ejaculate actually got inside you okay? its not good to keep using the plan B if not needed, maybe consider going on birth control. But you should be fine, so no worries.