Cinnamon I have to disagree in a friendly fashion about the group 0 car seat

It was invaluable to us to be able to quickly move her - the recommended time in them is maximum 2 hours not 30 mins. That would be near impossible to get anywhere! I used it for quick trips into town and could just move the car seat without waking her and clip it on the pram and quickly do my errands with the huge Uppababy Vista basket (still love it!) - she usually woke if we unstrapped her (not always). Having said that we often carried her in our arms until she was 3 or 4 months old. We never carried her in the car seat, why would you, I don't get people who do that. They are so heavy, carry the baby if you aren't going far enough to use the pram! It's MUCH better for the baby to be right next to you in your arms than in any sort of carriage (baby wearing not included of course, this is good too
) They are so much happier being carried. I loathe seeing people dragging a car seat around the shop or into a GP surgery. WHY??? Give it a cuddle!!! And save your back...
Most of the time I did get her out and put her in the pram because I felt it was better for her, unless we had had a day of difficulty with sleep and needed to make the most of it, or it was a short trip. If ever I stopped for a coffee she would come out for a cuddle (and usually a feed!) too!
Secondly we did tons of research before we bought a car seat, dh is a stickler for spread sheets too and knowing everything about everything before making any decisions. The group 0 car seats come out safer in Which for newborns if used correctly. So for us that was that, she got the maxi cosi pebble with the travel system (came out better than the cabriofix at the time and was isofix).
We have now got dd in a front facing maxi cosi priori isofix, and she has been in it since she was about 16 months old. It cost £170 I think but again is good on safety and she loves being able to sit forward like a grown up. Rear facing have lots going for them safety wise and can be safer but it must be the right car or it is more dangerous! Best to see a car seat fitter for stage 1 car seat to make sure you get the best sort for your situation (plus what you have found out of course). The Priori goes up to age 4 I think. The car seats after that are pretty much just booster seats with a shell of a back and don't cost a lot at all - about £20-£30 since they use the usual car seat belt instead of having their own.
Basically we started with the travel system and were happy that for us it was the right decision, convenient and safer (in our opinion). But everyone is different!
Mumsnet is great for lots of different view points! 
Mel sorry to hear about dp. Keep your chin up, you have a bump that needs you to have your head on straight!
RL it can be hard but your dp obviously cares a lot about you and you about him. Try to detach yourself and let it blow over again. Being worried about your dc having an overbearing family is totally fair, and maybe you feel it would be better off without them - but would it truly be better off without your dp too? It sounds like you have been through a lot, and a strong small family unit (you, dp and it) is everything it needs for a great start. If there are problems once it is born things will be clearer then about what you need to do and how you need to do it. Until then, just breathe and find something else to occupy your mind.
Went to work this morning and found out I had been incorrectly booked on annual leave so got sent home again! Oh well, bonus since I wasn't really up for it today... Got chance to chat about my maternity leave though. Mine is starting probably on 23rd March but annual leave from 16th March so finish on 13th March. Taking 9 months (current plan, hopefully I'm strong enough not to change my mind to a year half way through!) and then sticking most of my next year's annual leave on the end so returning on 25th January. My contract ends in April next year and I will have left myself about a week of annual leave to take between 25th Jan and whenever my post finishes in April, which feels about right.
25+3