First relax! There are no need to panic.
Can you check the addresses in your Electrum and see if one of your address from previous ledger is there?
Assuming you know at least a BTC address of your ledger and also assuming you know how to search for address in Electrum. Let me know. Let's go one step after another.
I am using the same Ledger. Just a new Win 10 laptop, which i only piurchased in orfer to install Ledger Live.
But i needed a quick transaction so just used Electrum/Ledger.
There is no previous ledger, only a new Win10 with more security than my 9 year old Acer which is was honestly quicker than this!!
I'm stressed!!!