Discharge and signs or first period??? GIRLS!?

for the past two days ive had an on-going headache and a stomach ache. i feel kinda woozy like throw uppy like and last night i did throw up. my friend says to me "period time!" when i told her about it. i havnt had mine yet....oh, and i know that when u get ur first period you have like discharge? im not sure what that looks like....like i may have gotten it but i dont know.