Could i be pregnant if i apparently got my period as normal soon after plan b, bled again 8 days later and am now late for my next period?

Hard to say: Plan B works very well, but it's not perfect. But it's also a hormone and is known to mess with your cycle after taking it too which may explain why you are bleeding abnormally and are now late. However, if you've had unprotected sex and aren't on birth control I would consider taking a pregnancy test to make sure that's not the cause. Your cycle should even out in the next month or so.