I picked my son up from daycare this afternoon, and there is another baby around his age there. My son has always had a…

I picked my son up from daycare this afternoon, and there is another baby around his age there. My son has always had a hard time with the other baby being around. Today the daycare lady told me my son had such a hard time, one of the times the other baby went near him he started crying and shaking so she had to pick him up! My heart is literally broken I have been crying all day! I have no idea what to do! I hate the thought of my baby being afraid or upset! Am I crazy? What should I do? HELP!