Last use it was down to 1012 after 3 days (from 1047) and then FG 1011 (it was left 2 weeks but I assume was done on day 4 or 5). This was the Wyeast 1469. I pitched a large healthy starter so it took off quickly.
Also consider that the rise in temperature from 19 to 22 will have caused airlock activity as when temp rises, gas needs to escape through the airlock. It may have finished as you were expecting but still be bubbling due to this. Only way to be sure is to take a reading.
Edit - just noticed you said you were taking refractometer readings. If these are accurate and adjusted to account for alcohol, you may just have to wait it out.