Faint positive then x3 negatives

[Tma03]

I had a positive test Monday morning although very faint it was within the time frame and pink. A different branded one the following morning was negative and then 2 negative today (FMU and another in afternoon). I take a continuous pill so no period dates to go by but I know that I missed a pill and done the deed 3 weeks ago so if I was pregnant it would still be super early.
Is this likely to be a false positive or CP or perhaps just way to early still?
Thankyou x

What brand was the first test? x

It was an asda own brand pink dye. The other was a chemist own brand. X (not sure if my first reply posted) x

Hi
I’m looking for anyone been in the same situation... I’m 28 weeks pregnant and just been advised I am at risk of redundancy I’m so upset any advice would be great