Hello, Thanks for choosing health care magic for posting your query. I have gone through your question in detail and I can understand what you are going through. The headache and breast discomfort alone cannot justify a diagnosis of pregnancy. There could be plenty of other reasons for the same and yes pill withdrawal is an important reason. The best way would be to do a urine pregnancy test and confirm. Hope I am able to answer your concerns. If you have any further query, I would be glad to help you. In future if you wish to contact me directly, you can use the below mentioned link: bit.ly/dr-srikanth-reddy Wish you good health, Kind regards Dr. Srikanth Reddy M.D.