Period after plan b

Hey

If you get ur period for 3 days after taking plan b a week after u had ur normal period is that considered spotting or actual period?? i don’t know if I should be expecting my normal period or if I shouldn’t due to plan my normal period came in 02./03 until 02/08 then I took plan b the 10 and then got my period again for 3 days on the 15 thru 17 but I’m supposed to expect my regular period on The 2nd