Is your period late? Planned parenthood only does urine tests....the same as you have from the store. If you are late with your period and still getting a negative go to see your regular doctor
I'm in the same boat. I'm a week late on my period with tons of symptoms for a few weeks yet negative tests still. I'd go in asap better to find out! I have an appt. On the 8th :) good luck!
Call asap. The best way to tell is a blood test. The sooner you get tested, the better. Store bought pregnancy could be prone to random malfunctions causing a false response. Go to the doctor and see about it