Feeling of ear fullness in left ear and numbness near ear. Any suggestions?

That's a need for MD. Best solution would be to have this examined by a professional (family doctor), and throat cultured and assessed. Upper respiratory tract infections may well be due to virus, bacteria, etc. You might try using a netti-pot or nasal saline spray along with a decongestant and nsaid. This sounds like it may be due to sinus disease, in which case the above might well help.