Did I hit the ovulation lottery or what?? (OPK question)

Kas
Okay, I sometimes have anovulatory months and don't always get +OPKs - when I do, I certainly don't get them super strong looking. 
I had an HSG last cycle. Now this cycle I had a couple of really strong +OPKs on 10/10. Now it's 10/12 and it's still looking pretty good. This never happens for me. Is this normal for you all?
Pic descriptions: 
First pic is the OPKs from 10/10 when they were still "fresh"
Second pic is three days of OPKs