Spotted for 7 days 17 days late on period sore breast and having hot flashes took dollar store pregnancy test came back negative in not on birth control could i be pregnant?

Not likely.: If you checked a urine pregnancy test appropriately and it is negative, you should be very comfortable with that diagnosis (i.e. No pregnancy). If you still have concerns, talk to your gynecologist without delay.

Possibly: Could likely be hormonal problem such as perimenopausal, thyroid disorder, pco.

Yes: False negatives occur, recheck in 1 week.

Possibly: A pregnancy test should be able to detect HCG at 17 days after missed period. However, I agree with repeating the test using a first morning void.