Baby #2

Samantha
My first born is 10 months old, i just found out I'm pregnant again with our second. Does anybody have experience with babies this close in age?im so worried my son will resent his new baby brother or sister or i wont give him enough attention or he'll act out i dont know how to feel,as soon as we decided to keep him an only child i find out the next day lol i just need a little assurance it'll be ok and my son will be okay lol