Teeth?

Since Christmas Mason has been acting "not himself".  At first we thought maybe it was because he was mad due to all the craziness of Christmas and traveling from house to house.  Then we thought it was a flu bug.  Then we thought it was his formula.  Now.....we think its teeth.  His gums look a little white on the bottom and he has been drooling and gnawing on everything he can get his hands on.  Sooo....hopefully that is our answer! 
Last night was an exciting night- I gave him some baby food for the first time.  He had eaten a 6 oz bottle about an hour earlier and was just acting like he was still hungry.  So first I made some cereal and it just didnt seem like that was doing it so I got out the Sweet Potatoes!  He loved it!  After he finished eating he was a sleepy sleepy boy and ended up sleeping from about 7:30 til 5:30 this morning!!! He hasn't been sleeping very well at night these past few weeks so it was a wonderful change for both of us.