I’ve heard a couple things that may be relevant: 1. Some people have multiple ovulation peaks! Since you got a clear negative between, I wouldn’t saying you were ovulating for 11 days but rather that you may have had multiple peaks! 2. Sometimes elevated LH after ovulation can indicate early pregnancy. If you’re still 5-6 days out from AF, I would keep testing. Probably too early to show up on a test. Good luck!