Faint Lines... STILL?

Okay so last Tuesday I took a pregnancy test that was a little faint, and a few days later Friday I took another that has darkened up a bit . Well I had a medical hCG done yesterday evening that was faint all over again and I'm freaking out . My last period was august the 16 so I should be around 6 weeks . Not too sure why it lightened up, but I just recently had an ectopic in march and I have been having a little pain...

My first baby doctor visit isn't until oct 30th