Can you ovulate 3 days after a positive OPK?

Mel
Hey ladies - I'm hoping someone can help me out. I got my clearblue digital OPK positive on Saturday (after 2 days of the flashing high) however I religiously take my temperature and every month can pinpoint my shift but so far this month I've had no shift and it's Tuesday? I'm hoping to wake up tmw and get my temp increase which would have meant ovulation today (tuesday) but that's 3-4 days after my LH surge? Is that right/normal?