I have had regular periods since I was 13. I am now 30, have had one miscarriage, and one baby who is now 1. I have been off because pills for 4 months and have still maintained a regular cycle. I am now 4 days past due for a period and have not seen one. My breasts are swollen, I have had on and off nausea, and a killer headache about every other day. I have taken 2 home pregnancy tests 3 days apart and both were negative. Should I see my doctor?