The no shot/stall issue is exactly why I was suggesting that Corrine reduce the dose - so she could shoot consistently. She's still getting her bearings, getting the hang of testing, and learning how Heidi responds to the insulin. Plus she observed symptoms which suggested there could have been a hypo.
Corinne, there are some secondary monitoring tools in a link in my signature. These are approximate (blood tests are 'gold standard'), but will give you some clues as to what is happening any time you aren't able to get a blood glucose test. The urine ketone testing is especially important while you are getting everything worked out. High levels of ketones can suggest diabetic ketoacidosis (the body breaks down fat for energy) a complication of diabetes which is an emergency, very expensive to treat, and often requires hospitalization.