We didn't have a car at all when we started trying, and only decided to buy one so we could go on holidays and see my sister more easily. We bought it when I was 7 months pregnant; it's a 13 year old 4 door hatchback. Meets our needs. I wouldn't be in a rush to go out and buy a new one. see how you go - the car yards will still be there after you have the baby if it's not working.

Keep your money stashed, and make it work for you while you wait, that's my advice.