This happened with Olivia, regularly, took about 9-12 days to get back on track. I would do the pat/shh for a week for both naps, your lo will finally get the hint. If you are not successful after about 40min, stop & grt the babe up till next nap. I found after a week of pat/shh, I would put Olivia down 15min later (not to make her extremely overtired) & our pat/shh sessions would only take abot 15-20min by day 5-9 & back on track by day 12 at the latest. Just when you get things as close to perfect as you can, BUMP, another milestone/developmental or cold strikes! :roll:
It does not seem like a long time to me now, but sure seemed like forever when we were going through it. It is worth the effort, trust me. Olivia was very spirited & we invested alot of time in her sleeping/eating habits & it pays off tremedously in the long run, now that I have survived it. HTH & good luck.