This sounds like the problem I had not too long ago. My dentist told me to take 4 200mg ibuprofen every 4 hours for three days and gave me some muscel relaxers too. I took the meds as prescribed and after about 3 or 4 days it felt totally fine.
You have to do some face exercise daily.Consult a ortho specialist about it.Do not eat hard substances till you get cured.Avoid eating fat stuffs.This problem will become serious in winter season.So during winter cover your faceto get warmth to avoid cramp.
Yes, you should massage the area on the outside of your jaw with your hand. Apply light pressure and rub the area until the pain passes. It will normally last about 10-15 seconds. If all else fails just wait it out.