I am having a sharp pain on my left jaw, under the tongue and a sharp pain on my chest. what can be wrong with me and what can i do fast to relieve th?

Jaw and chest: What concerns me is the sharp pain in your chest! especially when you're also having jaw pain. While it could be lot's of other things, it may indicate a cardiac condition or even a heart attack. Please see a 24/7 emergency medical facility immediately or call 911. I don't want to alarm you but it is always best to be safe rather than sorry. It may not be anything serious but you never know.