3 and a half months and growing big

I take a lot of pictures of Cavin on my phone, but don't have a lot of smile pictures on my camera so I took some today and he is so cute I couldn't decide which one so I just put a lot up!!  I love this blue eyed, smiley, happy baby!
Cavin has been such a great baby, but the last 3 days he has had a hard time at night and just kind of fussy, I'm not sure if he's growing or teething, I thought growing cause he's eating a lot more and sleeping a lot.  He's up a lot at night and chewing on everything, so not sure.