I think as for getting baby stuff, go for it, but only if you can handle sering it or knowing its there in the unfortunate event you have difficulty or a loss. Im not trying to scare anyone and hope none has to experience either, but just being realistic.
Only reason I say this, I laybyd our pram within a week of getting our bfp, and mcd before we had got it off layby.... We kept it, and put it into the spare room, it was so difficult knowing it was there and there wasnt a baby in my belly anymore to fill it. we were lucky and I was preg again within 2 months and he is coming up to 2yo but I'm not sure how I would have coped had we had difficulty conceiving.
In saying that, im an organisational freak also. Before even falling pregnant, I had investigated absolutely everything, and decided on what I wanted, right down to my maternity wardrobe!!
We dont need as much this time But it hasnt stopped me looking at stuff! I cant get enough of online baby window shopping