Yum, crumpet krausen, it's a good place. :icon_drool2:
As above, use your hydrometer, but the krausen (on an ale yeast at least) is normally a pretty good hint that there is still something going on in there.
Generally you'd expect it to drop but that is a gross generalisation and far from a hard and fast rule.
You haven't given enough info to really know (brew type, temperature, yeast etc?) but it looks, on the face of it, like your dry hopping kicked off some fermentation again.
Is the fermenter in a fridge? If it is, wait until you hit stable SG readings in the zone of what you're after, then 'cold crash' - drop the temperature down to 5C and everything in the brew will drop down to the bottom = clearer beer.
Above all, I would be patient. trust your hydrometer.