yes, your period can totally be out of wack! mine would go away and come back every 3 months, some moms spot but dont get theirs back until after a year... its very likely that you bled because you were pumping and after that I assume she is nursing normal and frequent.
if the line was greyish then it was an evaporation line but if it was pink(or whatever color it should be) there is a possibility you are... you can wait a few weeks and test again to make sure
if the line was greyish then it was an evaporation line but if it was pink(or whatever color it should be) there is a possibility you are... you can wait a few weeks and test again to make sure