I have been on birth control for over 2yrs now with regular period and no pregnancy. Yet this month my period is MIA, I have been having headaches, cramps, lower back pain and I have not really been hungry not really sick just not hungry. I took 2 at home tests both negative, then after being over a week late I did a blood test which came back negative and so my doctor said i should start up my birth control again...but I still have all the symptoms and I have never missed a period. I am just paranoid and should I just start back on my BC...