3 may be too many pumps all at once? The body doesn't get where it is suddenly, so it takes a while for things to adjust?
How long do you give the medication to work? It's not easy to wait for results but sometimes we need to give it time to work

Do you keep a diary, I can't remember.
Any number of reasons for us not to sleep easily and it can become a self fulfilling situation. I was in a very stressful job for 8 years then found it hard to get good sleep so the GP gave me 5 tablets. 3 nights with a tablet and 2 left over. I knew that the tablets gave release. As does relaxation therapy and now I can have a 'bad' night without worrying too much. I read. Usually.