Harriet - I'm sorry you're having it still so rough....I was away on vacation, so I'm sorry you've been out here on your own. I know you have been super consistent. You've been doing a great job!! I know it doesn't look like that. It's possible that she will just have to grow out of her 45 min naps - if you've been doing w2s consistently for 3 weeks, I would think you'd be seeing more improvement than you are, which is why I'm wondering if it's just developmental.
Your thought of doing 5 naps a day (all short ones) may be an option for now - if for nothing else than to give you a break from the sleep training. You are right that she will pick up on your stress, so that is most certainly not doing you or Evie any good.
How is today? If she's doing 20 min naps, it's possible now that it is regression again. If she's got some spirited in her, she will definitely benefit from a shorter winddown. Have you tried a super short wind down? Maybe just diaper change, swaddle, and into the crib? Are you ssh/patting her to get her to drop off to sleep or just to get her through the jolts? If you don't go in to help her past the jolt - does she wake crying? Also, sometimes spirited bubs are really distracted by what's going on in their rooms - too much light, too many toys around their bed, a mobile or a bumper with lots going on. So maybe have a look at that. Its possible when she wakes at the jolts that she's too distracted to get herself back to sleep. then again, you doing shh/pat doesn't seem to be a distraction, but rather an aid - have you thought of a white noise machine?
Hang in there!!! I'm going to have another mod look at your post - I know her ds struggled with short naps for a long time, so lets see what she did if that will help you.
michelle