That's not very good news...
If you really need to get out of your contract, you best bet is probably to consult an attorney. Without any contingencies, there isn't going to be an easy way out that I know of.
Sometimes you can also just talk to the seller, tell them what you are thinking and possibly come up with some kind of an exit negotiation.
Good Luck C!
If you didn't use an agent, or if your agent didn't write any contingencies into the contract, there are still a few built into the SC state contract. (If correctly filled out) Is your contract contingent upon anything? Perk testing? Survey? Financing?