That's sad, but your key…

That's sad, but your key has probably been stolen. I see 34 published event where your LN address was changed to lnbits. The last one was this:

relay 'wss://relay.nostr.ch' event '["EVENT","1",{"id":"1a4d5ffe81826555a5540024aeefc2b37c90745791177654c28a81bbaf084ebd","pubkey":"3f770d65d3a764a9c5cb503ae123e62ec7598ad035d836e2a810f3877a745b24","created_at":1674828562,"kind":0,"tags":[],"content":"{"npub":"npub18ams6ewn5aj2n3wt2qawzglx9mr4nzksxhvrdc4gzrecw7n5tvjqctp424","name":"DerekRoss","about":"Bitcoin HODLer, home miner, and node runner. #Bitcoin only. Systems Administrator. NostrPlebs.com","picture":"https://void.cat/d/ED5XcQYebiqrgqQFtDM3Xd\",\"nip05\":\"derekross@nostrplebs.com\",\"lud06\":\"LNURL1DP68GURN8GHJ7MR9VAJKUEPWD3HXY6T5WVHXXMMD9AKXUATJD3CZ76ZZGA65VDSHC6WKV\",\"lud16\":\"pay@derekross.me\",\"display_name\":\"Derek Ross","website":"NostrPlebs.com","banner":"https://void.cat/d/J9c2jiSocXbhTnZ6b2bCy9\"}","sig":"6ea16014c3e5b503fd9ded1a3c3304cb313bfce1fc125888e703012d8194f0847a3439d73225deb015170ff39d29bf61c5d71e32cff05ec398103e31ccd768ac"}]'