Saving .txt file in Swedish became unreadable
I saved a document I wrote in Swedish in TextEdit and it became unreadable. The characters became symbols and I can't figure out how to change it back. My saving defaults for encoding were in automatic. I have tried to open it in TextWrangler and open the text in UTF-8 and UTF-8 with BOM and I can't get it back to normal. It is a 200+ page document and it is vital that I change it back ASAP. Does anyone have a suggestion? I would be very grateful. Thanks!
MacBook Air, OS X Yosemite (10.10.5)