I don't want to scare you but, get your coins out of blockchain.info immediately. Having your bitcoins stored with a 3rd party is very risky, you don't get to have full control over your wallet. Depending on how much coins you have, i would recommend Electrum. This wallet gives you access to your private keys and pretty much you can administrate your wallet at your will. If you have more than 2 BTC then I would go for a hardware wallet, a Ledger Nano S or a Trezor wallet.