S.H.
My 4th baby was this way. Thanksgiving and Christmas were a nightmare. They do tend to grow out of it as my now 2.5 yr old daughter is relatively social, does not get fussy when we have people in our house. It is quite a dramatic difference from when she was a baby. Give it time.
Also, if she has something/does something for comfort (mine has a blanket and sucks her finger), make sure she has those things when she gets fussy. its her way of calming herself down.