Was your beer done fermenting BEFORE you transferred it to secondary.
Secondary fermentation is a misnomer. It is really for clearing up the beer. No fermentation should really be taking place in most beers.
You need to let the ferment finish, That is gravity reading that are the same over three days, THEN transfer (if you want to, it is not necessary). Then leave it alone for another week or two then bottle.
When you do bottle, wait 2 weeks before cooling ONE for 2 days. If it is not tasty and well carbonated wait another week and try ONE. etc.