Another baby 20 weeks pp. Anyone else prego again?

This was my group last year but my baby ended up being born Jan 1 2019. I just found out 3 days ago my 4 and a half month old is going to be 13 months old when I have this second baby. Im so emotional but excited to have a sibling for my babygirl. Any advice for 2 under 2?

The not so big, big sister!