I had my tubes tied nearly ten years ago during my second c-section. Today, I am 13 days late, which has only happend twice in my life...babies. I know several women who've conceived after ligation so I bought a three pack of tests. First was negative. Second was a T, instead of a + plus. and the third was an upside down T. The horizontal line appears if the test was done correctly and remains as a negative sign if not pregnant. The only way to get the vertical line is if hcg is detected, but my vertical line was only a partial one and very skinny. Anyone ever heard of getting partial lines?