If he continues to be so selfish, he is damaging his relationship with you. Is his sport so great, that he is prepared to lose wife and child over it? That sounds dramatic, but if he continues showing so little respect, for you, for what you're going thru, for your child - it COULD come to that.
I sometimes imagine myself reaching breaking point, and taking off one day. And saying to him, I ASKED you to take a break for just one season, and you wouldn't. So now YOU deal with this.
Of course I wouldn't actually do this. Just a wild fantasy that I indulge in sometimes, when I am feeling unsupported.
Oh and your comment about why didn't you crash the car..... guess what I did when DD was 2 months old? A write-off! But that's another story (we didn't tell our family - pretended that our car died and so we had to get another one) Bad times...
Does your 4-year-old sleep through now?

Zaki&Amali ~ that is sweet of you to say you'd give me a break if you could. ... I don't mind people telling me it will get easier, but I guess I don't believe that it will get easier for ME. I remember being told that by the time my DD was 3 MONTHS old, it would all fall into place! Pfffffttt!

Beanybub ~ the depressing thing is that my daughter is 16 months old.... older than your son, and things still aren't great. I know Gigi said it is the lack of sleep and lack of support that is the cause of my difficulty, but I can't help thinking....
if I were a better mum, I would be able to handle things by now, surely!
Doesn't help that my 2 sister-in-laws (who I don't know at all, really) give the impression that motherhood is one constant state of easy bliss. One even said that her kids (younger than my DD) sleep through because she "put in the hard work in the early days".... what, so I didn't "work hard" enough?!!

Thanks EVERYONE for taking the time to reply to me!!