You spend the last of the Bitcoins that were sent to the address about 2 years ago. Maybe blockchain wallet was showing you wrong as if you still had the 0.005 BTC due to syncing problems (because blockchain explorers rarely lie), or perhaps you saw the 0.005 BCH that's still there thinking it's BTC.
The OP is confusing Bitcoin for Bitcoin cash, possibly because he has not accessed the wallet for a long time, he had zero (0) Bitcoin balance but 0.00547 BCH balance. So, he can forget and later thinking it is Bitcoin. Like I have explained above.Probably I forgot which coin I had? If I have bch, but my account shows 0 balance on BCH wallet.