Before anyone is negative thinking I'm stupid for that question let me explain..

I'm a pee on a stick addict so I use a hpt every day. Every morning I wake up I use a pre work out drink called legion pulse. I noticed that on days that I drink this, I always have a faint line on my pregnancy test, so I stopped using it and started getting bfns, started drinking it again and another faint positive. Weird, crazy? Yes! But this is true and I don't understand what could be going on...completely lost on this.