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Sucks OP. The big takeaway is is NEVER EVER enter your seed phrase into the ledger live app. You even said it seemed fishy but you eventually caved and typed it in. That’s where you made the mistake.
Let’s say you didn’t enter in the seed phrase and you came here asking for help. What I would have told you is some kind of undetectable malware made it’s way onto your computer. At that point, consider your computer totally compromised. I would have advised a 100% clean install of your OS and re-install all your apps/utilities from scratch as well. At that point, hopefully Ledger Live would come up without prompting for a seed phrase.