Lighter line-What’s up

So I’m in my 10-11 week of pregnancy. I have been on and off testing to see my line progression. However last two tests were lighter than the first few I took of the same brand. I am curious if this is to be of concern both were taken in the morning. Mind you I do drink a lot more fluids at night now than before. This is my first official pregnancy and I think I’m a little paranoid but I definitely would like some insight. The lines are not severely lighter but definitely lighter than the last few. Should I be concerned???