test line getting paler - should i be worried

[eggybrokenoff]

Had a miscarriage before so keep testing for reassurance
about 7 and a half weeks and line is suddenly very faint -
is this a worrying sign?

There's an effect called the "hook" effect whereby too much HCG makes the line go lighter. It happens around 6-8 weeks so you're in the right zone for it. Sometimes by diluting the wee, and using that, the line goes darker again. Give it a go!

I'm sure it is fine though :)

No criticism from me for testing for reassurance, guilty as charged with every pregnancy which is how I know this stuff!