Buying stuff

I am 15 weeks and some change and I feel like we are running out of time to get ready. The plan is to move the baby in with my older daughter who is 11 and can not wait to have the baby share a room. However I want to completely redo her room as she's had the some of the same furniture since she was born (which was a hand me down to begin with) nothing is wrong with it but it's a little babyish for her. Anyways long story short I'm starting to get super antsy to get started. Hubby on the other hand is like we have all the time in the world.... And at the same time I agree 5months seems like a long time and I feel like it's too soon too. I keep going back and forth and making myself crazy. The last thing I want to do is be shopping at 35+ weeks when I'm miserable and huge. I have this huge fear bc I'm the worlds worst at procrastinating I'll go into labor and won't have anything ready!! Add to that I'm starting to freak out about actual labor. I've had 2 kids but it's been 10 years and I don't know what to expect this time. Ahhhhh.....