Instruct: Classify a review into positive or negative sentiment.
Query: Doesn't Work

This pregnancy test didn't work at all for me. I had used Wondfo internet test strips and they started showing a faint line. I then tested with a Safeway brand pregnancy test, which showed an obvious line. Just to be sure I went out and bought the First Response Early test. It showed a complete negative! I was 1 day before my expected period when I took. It. I used the remaining tests that evening and next morning... which also were NEGATIVE. I was really confused, as the Wondfo strip tests continued to get darker. I then went out and got the First Response digital a day after my expected period, and both of those were also negative. I went and got a blood test that same morning, and it was POSITIVE. The First Response brand was horrible for me, and caused a lot of worry. I guess I was the 1% it wasn't accurate on.... which I highly doubt. These are horrible and I wasted $40 on First Response. $5 Wondfo tests, and $9.00 generic Safeway brand test were accurate and much more affordable!