Driving myself insane

I’m a serial tester, I wish I had the patience to wait but I just don’t. In all the years of trying I’ve hardly ever gotten indents on tests. I noticed a faint line on one of my cheapies, thought it might be an indent so I took a FRER. Same line there. I’ve had the same line on 3 FRERs and 4 more cheapies now in the past three days. What’s the likelihood that they’d all be indents? But if they aren’t and are positives tests why isn’t the line getting darker? Anyone else have this happen and it end up being positive? I hate this waiting and the not knowing.