Morning everyone
Sorry to hear some of you are having a tough time with families. I've been there and gone no contact with a couple of mine and although it's a horrible thing to have to do, ultimately it was the best decision and I feel a lot less stress because of it 
Welcome to all the newbies, quite a few recently! apple regarding car seats, definitely get someone at a big store to check what fits in your car safely, not all car seats fit all cars so that's a good starting point. Then think about whether you will leave the seat in the car all the time and just lift baby out, or whether you want a seat that clips onto a buggy frame for walking around the shops etc (I found this invaluable for when they were asleep!). If you want one that clips onto a frame you need to look at which ones work with the travel system that you want - so either go very universal eg the maxi cosi cabriofix or pebble which has adapters for most brands of travel system, or get the car seat specifically designed for the travel system you want.
Personally, we went for the maxi cosi cabriofix last time and will use it again for this baby, I found it easy to use, adaptable and I never had a problem with it.
I've been feeling loads of kicks recently! (18+1 today) it's so strange to think I'm doing all this again. Definitely not as restful as last time round, I've been getting some pain in my back and bum, sciatica I think which in worried about because I have some damage down there from forceps delivery and I can't sit and rest this time so concerned it will get worse and worse 
Hope everyone else is well, any scans coming up this week?