I am 25 years old, I have been on birth control for the last 2 years with regular period and no pregnancies. this month tho my period is over a week late I took 2 at home pregnancy tests both negative, so I went to the doctor and got a blood test which came back negative. My doctor told me to go back on my birth control but I just don't know if I should...I have been having headaches, back aches, and cramping but again no period...looking for peoples thoughts..