Thankful I have never experienced that. I just saved a bit of Bitcoin and chose not to use it. And how can you lose 5BTC. 5 Bitcoin is a huge amount for this year. I hope you can start from the beginning by forgetting the bad memories.
I lost it simply by not understanding the security side of things 4 years ago. I was quite involved with all the technical side of things, mining etc but never really thought about the security side of things. All a learning curve I guess!