I took a pregnant. Test and it showed up a faint horizontal line but no vertical line and the control line is dark! The second one showed up blank results window dark control line in that window!

I suggest trying a different brand of test in a day or two.

Normally no matter how light the line is, a line means pregnant. That's what most boxes say

There are new digital tests out there that say "Pregnant" or "Not pregnant" They are the best. No confusion. I believe it was E.P.T. Brand but not sure.

I can't say for sure in your case what is going on... Some tests have 2 control lines. A plus sign means pregnant.