I could have written this post myself! I also took a 5 week break naughty I know but so nice to just use the oestrogen. I am on day 6 of a 12 day course and have literally not slept a wink, since I started this course, light sleep, tossing turning, feeling wired up, waking up exhausted, its dreadful. I have mentioned before that Utrogestan has this effect on me and people said no cannot be, it makes one sleepy, most definitely does not! Feel like I have had a few good cups of strong coffee, get palpitations as well, I stick it out as its only 12 days every 5 or so weeks but I do look forward to the end of the cycle, make no mistake.