think I'm expecting number 2

I can't control my excitement... I know it's early to be excited I have to test again in 2 or 3 days as my lines are very faint and hard to see and could possible be Evap lines the last 2 days but I can't help it... currently have a 4 month old son who turns 1 Jan 11th. if I am in fact pregnant this ones due date is roughly around Jan 22nd. I can't believe I may have 2 babies that'll grow up close in age like me and my older sister we are shy of 13 months apart. any ways what would you buy for a second baby when you already have most of the baby things? the things I think I need are; double stroller, 3 in 1 seat for new baby, 2 toddler beds (1 for my son and new baby) this rocking chair I have my son that grows with baby til 4. and I think that's it... I have kept most of my son's onsies and sleepers, and a favorite outfit or 2 per size... trying to keep more gender neutral things... so if it's a girl I can buy a few really cute girlly outfits... if nexts a boy few new outfits aswell. i also kept brand new bibs, receiving blankets and swaddlers my son hasn't used since I received so many... should i also keep his soothers too, I don't use them really I have 2 that he used a hand ful of times if sterilized or buy new? also what double stroller do you guys Like? And please add what ever else you think I'm missing... My baby is formula fed as I cant breastfeed due to medication I take, so I will also be needing replacement nipples for bottles, may keep the 0+ ones as only used a few weeks if okay to use if sterlized. sorry I'm all over the place I am excited but also sad that I will have to return to work in a month Ish to collect enough hours for maternity leave again.. also any tips on being away from your baby I have a hard time leaving my baby with even my boyfriend when i run to the corner store for something.