OPK headache! Please help!!!

Stephanie
The bottom pic is from 5/10. It looked almost positive, just not quite there a few mins after I took it.  Everything taken after that test was extremely light. I took it in the morning before work and didn't get home until 12 hours later, so I figured I should count that as my peak day and maybe I missed the true positive. 
The top test is from this afternoon. Again, looks like in a few more hours it will be positive. 
Does this mean I'm ovulating twice this month? Or can the test fluctuate in color like that without actually having a peak day? 
This is my first time testing with these confusing things since my first AF after a miscarriage. So maybe my body is just still out of whack?