You took seasonal birth control for 3 weeks may 28-June 21st then you stopped it is now July 25 and no period.very sore boobs and theynever hurt like thistook hpt 2 days ago and was negative help?

I would get another test done. You could go free at any pregnancy health clinic. The first sign of pregnancy is sore and tender brest. That is alsow a sign of a period coming. Wath for other symptoms of pregnany. Do you have to urinate more often? Are you feeling sick?