my period started the 4th of september and i always have my period the week before my best friend. its been that way for four years now. shes already had her period and i still havent had mine. i was supposed to start on the 3rd of october...and now its the 14th. can anyone please help me out by giving me some helpful information. im 21 almost 22 and had a miscarraige 2.5 years ago and i have a bunch of the symptoms of pregnancy but im still not sure if i am or not. please help me. thank you.