First Response Early Response pregnancy test help...!?

I don't think I'm testing too early, I have not had any sex for three months now. I went to the doctor and had a blood test done a couple days back and the result was negative. This is not sitting well with me, I feel undoubtedly pregnant and the doctor even decided to tell me that they once had a woman who showed negative blood work and would come back complaining about symptoms so they finally did and ultrasound that showed she was 5 months pregnant. That made me even more uneasy about the blood test! So, I decided to take matters into my own hands and did a few HPT's. I took two First Response Early Response pregnancy tests. One last night late in the afternoon that was a clear negative. Then I took one once again this morning. It looked negative at first glance, then looking closer there was a line were the positive would appear with no color, it looked like an indent line. I took a picture then took the test apart, and sure enough it was. There was a colorless indent in the strip that appeared WITHIN the time limit. I went back to the test I took last night and this also had that indent mark, but this happened out of the time period. I don't know whether to take this as a positive?