LH surge after ovulation?

JBo
So I got my solid smiley this morning (CD14) but I wonder if I didn't ovulate yesterday.  I had that ovulation cramping that I always get yesterdat but yesterday's test was a blinky face.  I read somewhere that as we get older (Im 39) the LH surge can actually occur after we ovulate.  Anyone else have this experience getting positive OPK after you think you already ovulated?
Anyway hoping we didnt miss our window.  We BD Friday night (CD12) and will again today...if DH ever wakes up that is!!! :-)