I'm 16 and I've missed my last 2 periods my periods are always regular and always have been every month, I'm scared I may be pregnant and I dot know what to do I have been having all the symptoms for pregnancy. My boobs are tender and bigger, back and stomach pains, fatigue and the small things like my legs hurting easily an my feet hurting after 5 minutes I have taken a pregnancy test and it has come back negative but I don't understand my periods have always come every month and I'm getting all the symptoms I need some help!?!?