Faulty First Response?

Daisy
Hello all! So, I took this test yesterday, not FMU, and after 20-25 minutes the second line was gone.
I tested again this morning, FMU, and it was negative. BUT my hands were shaking and I didn't hold it long enough, so I had to add more urine but it was mid-stream so it wasn't like I stopped for very long. 
The reasons why I ask if it's faulty is because I can see three lines not just two and because the test line disappeared. 
Has this ever happened to anyone else? And were you actually pregnant? 
I've bought two more FRER, I'll be taking them in the morning.