Still pregnant?

Hello ladies... Ok so I did a clear lie digital on Friday evening with a one step dip test, both came back positive although line on one step was faint. I then did a clear blue digital yesterday morning so my fiancé could see and it came back positive 1-2 weeks. I've just done a one step dip (I'm a worrier to just checking im a pregnant, bad know!) and the line is super faint again, like it was a couple days before I got the BFP on clear blue. It is 3PM and I have been drinking today... Could it just be my urine is diluted? Any Thoughts would be great. Thanks xx