Can fluids effect tests

Laura

So I was due on last Sunday I’m around 7 days late on my period give or take 2 days, I don’t always come on straight away can always be 2 days late. But still no sign of my period at all. I done a pregnancy test and got an extremely faint line only a slight part was blue. I’ve just come off a night shift though so I’ve drank tea/pop/water since 3pm yesterday... could that effect a pregnancy test? Should I do one once I’ve slept in the day?

Thankyouuu