Hi Aliceiw
I routinely took around a week to ten days to fall back into a regular sleeping pattern ranging from no sleep the first night and getting progressively better from there.
I think time is the most important factor but there are some common sense suggestions here:
https://www.better-sleep-better-life...mnia-tips.html http://www.nhs.uk/live-well/sleep-an...beat-insomnia/
D