First of all, relax. Nothing is too big to take your life, just relax.
Can you please tell where you live (at least the country)? This can help us find some right steps for next course of action. First of all, Did you have any insurances for your house or any of your products, if so, then start by contacting the insurer, and in these cases, they would just give you sort of settlement price, becaus efor most things damage is done beyond repairs. Most likely your clothes (at least the natural fabrics, like cotton) would be all ruined. But synthetic fibres, and even some of your musical instruments (non wooden parts) and even some pc parts (depending on your cases, and actual salinity of water) would be recoverable, so please do consider to collect them.