With DD didn't buy pram till about 10 weeks just BW until then. One thing find pram useful for is when you are out and want to sit down have coffee and eat, you can do it easy enough when BW but I was a bit paranoid about coffee on head, and they always get crumbs all over them - so I prefer to put down in pram etc to eat - some places you can put them somewhere while you eat but some places you can't. My advice would be just wait and see - you can buy when bubs is born easy enough and then you will probably have more ideas about what you do and don't want.