i got my normal period at the end of april the 21st as per usual and it seemed completely normal it was about 4 days long which is normal for me, ive never had a period longer then that. last friday may 11th i got i guess my period again, it was alot heavier then usual and the color was a little different, its over a week later and im still kinda spotting, during the week i had my not supposed to be here period, i had a sore back and i was getting horrible pains in my stomach and i was vomiting and nausea all week. is it possible for me to be pregnant and not be aware, and have miscarried. im 20 years old and underweight if that matters for anything.