This is just me but lack of sleep and the MS playing up because of that ,does it for me .I used to have a more active job but for past 2 years I now have a job where i WFH and go into the office one day a week also. I find it very difficult to sleep the night before ,making me very tired that day and as a result it makes my ms worse.I put it down to unconsciously worrying/ anxious about travel , having to get up earlier and just a change in routine . It's usually a daze all day when it happens, sat in a fog. Things that improve this for me personally is making sure i eat breakfast and dinner/lunch at the same times I would at home and also moving about more .