Understanding Possible Pregnancy Symptoms & Early Signs

Question
I know you are in the catagory about child birth but everyone that has to do with teen pregnancy or pregnancy is either maxed out or on vacation so I am hoping you can help me. I am not sure if I am pregnant but I would like your opinion. I took a test before I started my period and it was negative. I started my period friday night and i have been feeling a little different. On saturday and sunday I bled really heavy, and monday and today i am barely bleeding at all, i have been throwing up, and feeling light headed and dizzy. Maybe I am just sick, i dont know?!?! I havent really eaten alot lately and when i do i get sick! i know they say when your pregnant your constipated and if you have a period you bleed light and it is usually shorter. I have been having diarrhea and now i am bleeding light. Should i worry or am i just getting sick? Any help will be appreciated, oh and I am 17, if you would like to know. Thanks!

Answer
It is unusual to have a heavy period and still be pregnant.  Most likely you are just sick.  However, if you are still concerned that you may be pregnant, take another test.  If money is an issue, check with Planned Parenthood or other clinics in your area for a free pregnancy test.