It's not weird, it wasn't done, especially after only 5 days. Remember that active fermentation does not start immediately after you pitch the yeast. There is lag time which could be several hours to a couple days depending on many factors so those initial days of lag time are not part of the calendar, so to speak.
As mentioned above and to re-iterate, yeast do not work by calendar, they work with gravity at their own pace and the only way you know the beer is done is by taking gravity readings to ensure that it is still not dropping. Once you get a couple readings over 3 days that are stable do you know the beer is done, then ideally, you give the beer another week for the yeast to clean up and the beer to begin clearing.