Remember, the heating element and tumbler have separate power inputs.
The 220 line that goes to the dryer is actually used as 2 separate 110's.
One hot goes to the heating element, and the other goes to the tumbler.
A bad fuse, or half a breaker tripping can cause the loss of one or the other. If you can, pull the plug and verify you have 220 between the 2 hots, and separately 110 between each hot and the neutral. Also verify power to nuts where your power cord wires into the dryer.
Also, make sure you didn't accidentally switch the dryer into tumble (ie no heat) mode. I did that once, and felt like an idiot after troubleshooting the power line, coming to the conclusion the heating element was dead, informing my wife the dryer was broken, and then having her tell me she had it in tumble mode for some delicates.
The drum not rotating after that makes me think you might have a bad breaker though, as the heating and tumbling are separate. The breaker may have partially tripped, and then eventually fully tripped. Try reseting it to see if that fixes anything. If it does, I'd replace the breaker, as it should have tripped both lines, and not one and then the other.