Using Sensitive Toothpaste?

For a little over two weeks now I've been using sensitive toothpaste because one of my molars was sometimes acting up whenever I drank anything really cold. I had a very mild "jolt" of sensitivity a couple of days ago but otherwise ever since I started using the toothpaste it seems to have helped. Its says on the toothpaste that I shouldn't use it for more than four weeks, but is that only if the sensitivity still persists? Should I keep using the sensitive toothpaste every day or switch back to regular?