I been trying to conceive for two months I believe we just recently did our second try took four pregnancy test all false,but been having pregnancy cravings,Fast metabolism(never had before),headaches,feelings sick,Fatigue,Bloted,and I'm always hot and also I got my period but it wasn't normal it was light as ever and only lasted 4 days(My normal period is 5-6 days and really Heavy) Could that mean that I'm pregnant ?