Well, in the absence of any other neurological deficit in the body or weakness, this seems to be related to abnormal posture/pressure effect over the ear and most likely, will resolve soon, with in few days.
This usually occurs due to abnormal and prolonged pressure over the nerves (leading to nerve injury which is reversible most of the times).
However, if this persist, does not improve or gets worse, see your doctor for evaluation.
You can also take B-12 supplement for few days as this helps in the recovery of an injured nerve.
I would have been worried too if i were at your place but let me reassure you that this is a treatable condition and carry a good prognosis with appropriate management.
Wish you good luck.
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