I really like the saying every cloud has a silver lining. 

I hadn’t planned to be in Berlin again today and hadn’t anything planned.  Schlosspark or Potsdam had caught my eye flicking through the guidebook but I thought they were too far out.

I was wrong and luck was with me. 
I left the hastily arranged hotel after breakfast. I had thought I was in the middle of nowhere, but I was wrong. There was a Railway Station just about 10 mins walk way. 

I jumped on the first train northwards and found it went all the way to Westend where it terminated. Westend looks like the closest station to Schlosspark. 
The park was just what I needed – serenity on a beautiful warm June morning – perfect to erase the anxiety built up over the last 12 hours.