What was your gravity going into the secondary? It sounds to me like if you have things moving around in there and you didn't stir it up at all, then your fermentation kicked off again.
If the beer just clouded back up with out a lot of activity (ie particals moving around) it could be a matter of temperature change and a slight haze comeing over the beer.
Either way let it sit for a while and check the gravity on it to see if fermentation is complete, and then let it clear.
"Yes, I am a pirate two hundred years too late. The cannons don't thunder there's nothin' to plunder,
I'm an [under] forty victim of fate, Arriving too late, arriving too late."