I know, I know don't worry yourself to death. But.... my appointment isn't until 1/21

Yesterday morning I tested and the line progressed from the previous day. But yesterday at work I had very light brown drops in my panties and when I wiped(no cramping). I was terrified! So when I get home I ran upstairs and took a test to see if it would be lighter or darker than the previous test and it was super dark!!!!

(TOP: YESTERDAY A.M TEST)

(BOTTOM: YESTERDAY P.M TEST)

I have a habit now of drinking water before bed. So this morning of course I took another test, same brand, but the light was a little lighter not much. Should I be worried?