Nervous about expecting #2

Hi all! I just found out I'm pregnant with 2nd child, my 1st is 7yo. So thrilled to get to be a mom again but so nervous about starting over with a new baby. I think I'm more anxious than when we had our first! Mind is racing with a million what ifs from how is my 7yo going to react to planning future family vacations, it's kinda crazy I know, it's almost making me sick. Anyone have any advice or words of wisdom?!