I am on birth control, and every month I get my period on time- which is the 4th week of each pack. For the past 2 months I have not had a period, but I did have period symptoms like headache, sore breasts, back pain, and cramping. I took 2 pregnancy tests at home last week and both read negative. I have always been irregular, but the BC has been regulating me since I started taking it in January. Also, I did miss 3 pills the other week because I was out of town and forgot them, but I doubled up like the doctor suggested to make up for the missed days. Could I be pregnant? Or is this normal?