What is happening with my ovulation tests?

I have been taking HCG and LH tests and my HCG tests show a very tiny faint line (you have to squint to see it) but my LH tests are showing strong, not faint lines..... I started my miscarriage bleed on November 20, so just over 3 weeks ago. The other day I had pink when I wiped, woke up the following day with 45 minutes of period cramps but no bleed, just a little brown discharge.... and nothing since. I’m not sure what these LH tests mean. Anyone have anything similar happen?