Dark-ish OPK before pos preg test?

J

These are all from different cycles. Usually after I ovulate my tests are light. Don’t go past 0.3. This cycle I’m 8dpo and dying to take a test but I know it’s too early for hcg.

I know you can sometimes get an lh surge before a period, but normally I don’t. But of course it can still happen.

Anyway, anyone had a darker, not necessarily positive OPK before they got their bfp?