Glad you feel better. Do yourself a huge favour- stop using internet to research symptoms. It's not a good place.
Indeed, Sweden is so nice, as are the people and quality of life. ( but up north in Lulea, it was a harsh climate- and reindeer roaming everywhere!)
I absolutely loved my visit to Istanbul last year. The architecture, food and friendly people were outstanding; I hope to visit there again one day.
Enjoy the holiday season.