Pregnant?

So first off, my periods are very regular and if I’m late it’s only by like a day.

On the 3rd of April I started having very light brown discharge on the tissue only when I wiped. Went like that for a few days some days even lighter. One day and only one time when I wiped there was a little bit of pink on the tissue, this was probley the 11th and after that there wasn’t any more coloured discharge. Yesterday I when I wiped there was your normal clear discharge but it had one very small streak of red in it. The last week I’ve been having mild cramps in my lower back and every so often I’ll get a minor cramp in my lower belly. I’ve taken a couple tests of different brands but their all negative. Is it possible im testing too soon if got pregnant later In my cycle or something? Right now I’m 8 days late.