Just give it a few more days and go get another one..and honestly I bought dollar test w all mine and all came out correct. They all came back positive and I was preggo all times.
are you using testing with your first AM urine?
you could be pregnant because even if the 2nd line is faint its still positive. The one that is negative are you sure you didnt see a really faint line on it?Anyway if you want to be really sure get a blood test done