Tapering Question

In preparation for Nationals, I was planning a full 3 week taper that would have started today. However, my back had other ideas and I have been dry all week. :badday: I am hoping to be able to swim tomorrow. My question is... do I continue on my regular planned schedule, or do I revise? How much training have I lost? Last good workout was last Friday. My focus events are the 100 and 200 Free. Right now I'm thinking that I should swim hard next week, and taper the 10 days preceding Nationals. :dunno: