line is changing - is this a sign or should I ignore?

Jos
Hello. Have been peeing on sticks every 3/4 days ever since I found out to keep me sane (6w0d today). But this morning I got a little worried. The first photo is from Tuesday and the bottlm one from today. On Tuesday the test line was fainter and my line stronger, now they are about the same even though my line appeared much quicker. I've started to drink more water... but not That much more, so it should be that much more dialuted? Has this happened to someone else? Hope my rainbow baby is ok 🌈 Don't have tests/scan until 7th of feb. Don't want this to be a sign of hormones going down! I will pee on a stick again on Sunday - this is probably giving me more stress than anything 😞