You might be gearing up to O. You should see a rise in the next day or two. Probably tomorrow.
Bding isn't going to affect your opks. You can O anywhere from roughly 12-48 hours after your surge. Since you didn't use an opk the day before your + it's possible you had a + on that day and O could arrive soon.
Keep covering your bases. My guess is, you haven't O'd yet.