I appreciate all your answers above and Sunshine thanks for reminding me of this important fact. I used to know that fact many moons ago but forgot lol (I've been a diabetic too long I guess!).
I took take of this issue another way after speaking to many people including a very helpful endo in Edmonton, Alberta. Firstly, on his recommendation I switched insulin. I now take Apidra instead of Novorapid. I believe the Novorapid may have been breaking down/crystallizing and/or I had a bad batch. Secondly, I put my infusion set in the back of my arm on the endo's recommendation. This is a site I had never used. Not only is my problem resolved, but I have been on the same infusion set for 5 days (important to those of us who have to pay for our own medication and supplies)... no plugging, no clogging, no "No Delivery" messages, no high blood sugar alarms during the night to wake me from my much needed sleep! Apidra is relatively new I believe but I'm in love with it. It comes in a tall 10 ml vial and works with the reservoirs most of us would use I expect. It's also less expensive than Novorapid and possibly Humulin/Humalog although I haven't used Humulin or Humalog in quite a while. Apidra is also reputed to be better for pump users in that it doesn't clog in tubing and infusion sets/cannulas. Google it. It has me impressed.
So that's my story. I would like to think my problem was resolved by the switch to Apidra and the change in infusion sites. But one never knows with this disease, eh? I just put this story out there for you guys.
Thanks again for all your responses.