Am I pregnant?

I took a clear blue pregnancy test today. It said that the results will show between 2-10 minutes and it was negative. I have checked it again after 30 minutes-still negative. After few hours, like 3 or so, my friend has found the test which was positive, but the line is barely showing. What to do you think? I'll be getting another one tomorrows morning, but I'm stressing out

Also the instructions said to ignore it if the results change after 10 minutes but still?

Im young, first time I had to take a pregnancy test. I was feeling funny, like not myself. My period is meant to start in less that two weeks