Drooling after 2 month vaccine?

Shelly
Hi Mamas.....my son just had his 2 month shot and has been drooling w no fever. I believe it was the rotavirus vaccine that was given orally. 
Has anyone else's LO reacted this way? 
How have you calmed him/her? My little sweetie seems to be having such a hard time sleeping and only wants to be near mama.