I have a friend who suffers from panic attacks and quite often they start with her tongue going numb, then she can go numb down one side, to the point she has called me during the night thinking she is having a stroke. The more she worries about it the worse it gets and she often becomes convinced she's dying. Again this is all linked to things from her past. Go see your doctor and have a talk about how you feel, both physically and emotionally. No one is going to force you to talk about things you don't want to and no one will think you're mad. If it is anxiety your doctor can give you tips on how to overcome it - breathing exercises and relaxation techniques for example, and a physical check up can also set your mind at rest that it's not something more serious. It can be a difficult thing to deal with on our own, good luck to you.