You typically ovulate 12-36 hours after a positive OPK. When you have two days of positive OPKs, it's my understanding that you typically date based on the first, or pick a time between both tests and consider that your positive OPK time and date.
You will generally experience a temp dip on the day of actual ovulation, followed by an increase once you've ovulated.
It is possible to get positive OPKs and fail to ovulate that time around.
Also, be sure you are using and reading your OPKs correctly -- many women don't. You do not use FMU with an OPK; be sure to test in the afternoon, and at the same time. Then, having a line isn't a positive in the same way that it is with an HPT; the test line needs to be AS DARK or DARKER THAN the control line.
With your temps, you need to test at the same time every day, before getting out of bed, and before moving around/waking up too much/talking. You need to use a BBT thermometer and NOT a standard digital thermometer, which isn't accurate enough.