addicted to taking pregnancy tests but

So I took a pregnancy test Sunday just gone and the positive line was so strong but now when I take them ( because I'm addicted to making sure I'm still pregnant) the positive line is getting weaker. I've had no bleeding or spotting and mild cramps slightly tender boobs but only when I touch them, should I be worried? first scan is on the 30th of this month. Bf thinks I'm paroniod what do you all think???