When the bitcoin fork occurs in couple weeks will I get both chains, forks, of bitcoin in my wallet?
No and no. You will only have Bitcoin in your current wallet. You will need to install a S2X compatible wallet, and either transfer your wallet there or import private keys to be able to use the S2X altcoin. However, due to lack of replay protection, I highly advise against trying to spend S2X coins as someone who isn't extremely tech savy. Otherwise, you're likely going to lose money.
Does it matter where my bitcoin is held?
As long as you hold your money in a wallet that gives you full control of your keys, e.g. Bitcoin Core, Armory, Electrum.
Ok, thanks. Do you have any suggestions of S2X compatible wallets?