Dye on the top of the strip?

I took a pregnancy test and it looked negative. I got curious and took it apart. (First response) and didn't see anything. Then I looked at it 5 mins later and there was a little pink at the top where the line should be. Does this mean I took it to early? I am not wanting to be pregnant so I'm nervous. I am on birth control and use condoms I feel like I'm crazy but my periods stoped and I am having back pain. I feel like I am nuts lol. But having a lot of anxiety.