Guys, a period of EWCM followed by positive OPK, followed by AF after 11-16 days is a very definitive confirmation for ovulation. LH wouldn't suddenly spike, unless you have a follie big enough to pop. They don't always see everything on the scan. I hear sometimes they wouldn't even see one of the ovaries at all, because it might be obstructed by the other organs. So really, you have nothing to worry about!