I am not superstitious, but boy is it hard to buy when you think you are going to jinx it all!
BUT it is not true!! Go ahead an buy-
One piece of information that someone gave me when I posted a similar question was on the big stuff (cribs, changing tables, etc). At least begin to inquire early because furniture can have long lead times. They are big and not always in stock. So look those up, call and ask how long if they are not in stock it would take to order one.