have I ovulated yet?

Samantha
Hi ladies, so this is our first month ttc I have 
 een tracking bbt and opks for 3 months so generally seem to ovulate between day 15 and 18 of my cycle. 
We've been Dtd regularly, me on the bottom and taking temps regularly (apart from Saturday am due to a late night and a few glasses of wine). I got a positive opk yesterday accompanied by quite a lot of egg white cv. I expected to see a change in my temp today to indicate ovulation but don't. What do you think? Am I still waiting on ovulation?