Inconsistent lines? Too pregnant?

So I have been testing every morning and night basically since I found out I was pregnant since I have been spotting so I was making sure my lines are getting darker until my first appointment. I’m six weeks and three days and noticed that sometimes when I pee my lines look a little lighter than the previous test, even if my urine isn’t diluted. I saw a comment from someone before about the Pregmate brand test giving her inconsistent lines and so this morning when I took my test I decided to take another because my first line looked splotchy and not as dark. The second test I diluted half with water and the test line came out much stronger and darker line than the one before. Could it be possible that my levels are so high that it’s starting to affect the tests and how they read? That’s the only reason why I diluted my second test is because I read that somewhere. I just don’t want to give myself a heart attack every time I test until my ultrasound on the fourth.

The top test is the one I did with my non-diluted first morning urine and the second one is the one I diluted by 50% with the same urine. Also for those of you that don’t know the line that is closest to the white strip is the test line.