I yawned three days ago and the right side of my jaw cracked very loudly. Shortly afterwards I felt some discomfort and when I moved my jaw, it felt tender and made a sort of squishy sound. Woke up in searing pain the next day and have been feeling it ever since. Should I go in any get seen?
Hello dear, This sound is due to stretching of muscle at jaw joint (known as TM joint). This usually happen during loud yawning or other activity which lead to excessive mouth opening. This disorder is known as MPDS in dentistry.  In most cases it resolves in 3-4 days by doing following -- avoid mouth opening as far as possible-eat soft food-avoid eating on affected side-analgesic and muscle relaxant medication for relief of symptoms In extreme cases such yawning may lead to joint dislocation which causes excessive pain. But in your case there are the least chance of dislocation. If your symptoms does not improve in next 2-3 days even after following above-mentioned advise then you should consult dentist. I hove this will help you. My best regard for early improvement.