I am 18 years old, i had sex on 05/26 i have had frequent urination since and just recently sore breast. i just took a home test today 08/10-negative ?

Missed period.: You missed your period. Your symptoms could be due to other reasons and not due to pregnancy. For a peace of mind you can repeat the test.

Urinary symptoms: You could be having signs and symptoms of a urinary tract infection, which include frequent urination and burning while urinating. The sore breasts would not likely be related to a urinary tract infection, and you should discuss this with your physician when you go in to checked for a urinary tract infection. Take care.