2Bedroom Apartment with my fiancé and my son and one on the way!

So me and my fiancé and son are living in a 2 bedroom apartment , when I found out I was pregnant i was so happy ! I still am , but I’m starting to think about how and where the new baby is going to fit in! (Room wise ). We plan on moving into a 3 bedroom home after our lease is up , but that’s not till 4 months after the baby is supposed to be here ! Any tips on making all the new baby stuff fit ? ( and no , my 2 year old son isn’t going to be able to share his room with the new baby because i don’t want the baby to wake him up during the night because he’s a very light sleeper.)