I can't figure out if I have ovulated...?

I have been charting my temps, checking my cervical position and using OPK's for about 3 months now. (I charted before I got pregnant with my daughter 4 years ago, so I'm not a total novice). I think my body is playing with me this month though. I got a dark positive OPK yesterday at noon. I did another one at 11 pm after I got home from work, and it was still positive. Hubby and I BD'ed and I went to sleep. I woke up this morning, and did my bbt, which dropped signifigantly as compared to the last few days. I know I won't know for a fact if I ovulated until I see if my temps have risen when I take my bbt tomorrow. Now the problem arises because I took another opk this morning, which was still dark positive. I checked my cervix, and it is still high, soft and open. So, is it possible that I ovulated all ready, or do the physical signs point to not ovulating yet? I am just worried, because I am on a 28/29 day cycle and if I haven't ovulated yet, that means I will ovulate on day 20/21, which isn't good. Okay, hope someone can give me some insite...