I Had Suffered An Episode Of Bell's Palsy On 2/6/16.

I had suffered an episode of Bell's Palsy on 2/6/16. It has almost been two months, however I still can't smile correctly and I still have a mild speech impediment even after seeing an ER dr that same day and gave me a prednisone and valtrex. But I noticed I am drooling still and my tongue feels like I burned it. I did not eat anything hot. Is this a side eddfect of my Bell's palsy and how long will this last?