There are several things that might have gone wrong, some cheap to fix and some not so cheap. The cheapest and most obvious would be hoses. One of the heater hoses might have ruptured, causing loss of fluid all over the compartment. There are 3 or 4 different heater hoses to check. The next possibility might be either the lower or upper radiator hose failed, causing antifreeze to be sprayed all over the engine compartment. Another possibility might be a defective radiator cap, releasing pressure before it is designed to. These possibilities are the cheap and easy fixes. I would bet your problem is one of these conditions.
The thermostat may be sticking closed, causing overheating. Another possibility might be the water pump failing to pump enough antifreeze to cool your engine, causing it to overheat. A leaking head gasket, cracked cylinder bore or head would also cause overheating. These conditions would contaminate the engine oil, so if your oil looks normal, the fault is probably not one of these conditions. Good luck.