
Well done for doing something you knew felt right. I was in a very similar position (not as high up as you though!!). I took on a little temporary christmas part time job in Sept 05, also at a large uk store, so we had a little extra month for Christmas. It wasnt too bad as my husband was home (on extended leave for 4 months). After Christmas, I got kept on and made permanent member of staff, same amount of hours but in the evenings as hubby had gone back to work. Just after Easter, there was a team leaders job advertised, full time and I felt I could do it so after sitting down and working out finances (childcare required) etc I applied and in June I got the job. It was going alright, although things were a struggle at home (with 4 children, one of whom was only 3). The hours I worked though werent designed for those with family as I started at 11 most days and finished at 8 pm which meant I only saw my children for an hour at breakfast time. By the time I got home at 9ish they would all be in bed.
I loved the job and the responsibility that came with it and I was doing over and above what was expected and learning different aspects that I didnt need to, just because I was enjoying it. However, not seeing my family was really hard and I was starting to feel guilty for just going to work. I had been doing this new role for 6 months before I decided I had to call it a day. I was offered a part time position again just as an advisor again but personally for me I couldnt do this after being a team leader at the same store and there wasnt an option of transferring to another. Like you, the day I left, a huge weight shifted and to be honest I havent looked back since. I am currently looking at the option of studying and doing a course but this I can work in and around the children going to school.
Sometimes, you just know when the time is right to change.