No, you should continue your NRT unless you relapse to regular smoking pattern. A slip is a temporary break in abstinence by smoking a cigarette. A relapse is a return to previous addictive usage patterns. A slip doesn't have to turn into relapse, and won't, unless you decide it will. Head for your support network. If you continue to ‘slip’ on a regular basis, you may need to rethink your quit-plan, using what you've learned from your slips.