Advice please!?

So, I have turned into a nervous wreck and paranoid since getting my bfp on 10/10 after being 1 day late for my period. I have taken 4 test so far but this morning's test looks a little fainter than the other days ones.

Left one is from 10/10 am and the right one is from 10/10 pm.

this was the one from 10/12

and this one is from today 10/13. Do ya notice it being fainter?? I know im being a little crazy but it gets fainter at the bottom of the test like