Look at a list of Litecoin web wallets to see if any one them sound familiar to you:
- LiteVault - Online Litecoin Wallet; private keys encrypted locally
- Hive Web Wallet - Online BTC/LTC wallet; private keys encrypted locally
- Liteaddress.org - Litecoin address generation tools (BIP38)
- Reddit LiteTip Bot - Give and receive Litecoin tips from reddit users
- Coinkite - Coinkite is a web wallet with merchant services, Point-of-Sale
terminals and debit cards.
- CoinWallet.co - Online wallet
- Harborly - Online wallet that can be linked with any US bank account
- HolyTransaction - Online wallet, multi-currency support
- Celery - Online wallet
- Cryptonator - Multi coin wallet
https://litecoin.info/Category:Services#Wallet_services
If you are able to locate your account, please send your LTC to an offline wallet with a strong password that you do not use on multiple sites.
Web wallets are not the most secure and your practice of reusing passwords on many websites is a horrible security practice.