After taking some medication, I slept better last night. Today is 1 May. Last night was Walpurgis Eve (https://en.m.wikipedia.org/wiki/Walpurgis_Night) and there were to be bonfires and singing. Unfortunately, in my brain addled state last night I forgot all about it, but I would have been in no condition to be out in the cold anyway. It's a little disappointing to have missed it, but plenty more to see and do.
Today my primary goal is to hit the museums and top of the list is the Vasa Museum (https://www.vasamuseet.se/en). I'm very excited about it and plan to get there at opening time.