Hi im 15 and i usually have my period every month but they usually last for a while, at least 7 to sometimes 10 days and now i am worried because it hasn't come for two months. I've had my period since i was 10 and they always last pretty long. I had sex 8 months ago, used protection and even used two pregnancy test because it didn't come on time. The tests came up negative and my period came shortly after that and have had my period until this point. Now its August and i haven't had my period since late May and don't know why? Is it possible that i am pregnant and not show any symptoms or could i have a hormonal imbalance?