Hi there
You wont need much just yet as now many meds can't be given under 3mths but things like baby calpol,teething gels,gripe water or infacol are good to have to hand when needed.For the time of yr as well some sun block is also a good idea. Thermometers syringes for giving meds if needed or you can get one like a dummy much easier. A list of useful contact numbers,i have one stuck to the inside of my medicine cupboard just in case,like Dr's,health visitor/midwife,hospital,pharmacy and nhs direct,never know whats gonna happen and they are all usefull for anything other than baby related.
I have baby oil with camolile(sp)good for after a bath if their skin gets dry or aloe gel also a good moisturiser for me as well.
All the best with the baby.
Emma