First response test

Hi! Although I've used Glow for a while.. I've never actually posted before but I need some advice please!!

Recently married and trying to conceive! Usually my cycles range from 28-32 days!! I've been tracking my ovulation to maximise my changes and this month I ovulated later than usual! 3 weeks after the start of my last period! I'm now just over a week since I ovulated (4 weeks today since the start so due any day!)

I took a first response test earlier and I can see a really faint line! Help!! Am I seeing things? Don't want to get my hopes up in case it's not!

Does this line usually appear faint on negative tests to show its working? Or is it that I could actually be pregnant?? I'll try again in a few more days.

Thanks x