Is this normal?

So some people probably weren’t even still taking test at 6 weeks but I am! The top two were from today, and the bottom test is from 4 weeks (April 18) and the test lines are getting not as strong and control lines getting normal and I’m just wondering is this normal for it to fluctuate a little?

Also I’ve had food poisoning the last two days so I’m super dehydrated but I’m back on my water and everything today but I didn’t know if being dehydrated could affect your HCG levels or not? And I wiped and had spotting for the first time since my pregnancy which I didn’t really freak out about or anything cause I know everyone spots and it was like one wipe and you couldn’t even tell the spotting was there hardly and I wiped again and nothing.

But anyways ladies is it normal for test to do this or dehydration to mess with your numbers? Super curious and super stressed out. Thank you.

Also still very much have pregnancy symptom under the sun.