Help please

Katy
Okay so I got my first bfp on 29/5 and tested with a clear blue digital, it said 1-2 weeks I thought I'd buy another one and see if it's progressing. I did it just now with fmu and the result was still 1-2 weeks when I should be 6 weeks 2 days today. I drink a lot of water everyday so I don't know if it's anything to do with that but I'm getting really worried :( anyone else had a similar experience and turned out fine ?