When your stomach growls after eating it's a sign it's working properly, but if accompanied by pain, swelling or fever it's time to see a doc.
Gasping may be a sign of sleep apnoea, while nose whistling after an injury or vigorous nose-picking might indicate a perforated septum. See a GP.
If you experience any pain, swelling or locking along with these sounds, seek medical advice.
You needn't worry about a clicking jaw unless your jaw locks or won't open and close all the way. Throat clicking could be a sign of neurological diseases.
Ringing is probably tinnitus, whereas hearing your heart beating in your ears is pulsatile tinnitus. You should seek professional help.
This condition is known as exploding head syndrome. Although it may disturb your sleep, it doesn't technically harm your health.
If you notice yourself making a wheezing sound as you cough, this might mean you have asthma and it's a sign to see a GP.