Losing weight in pregnancy

[Autumnsunshinebaby]

I'm not sure whether I ought to start trying to lose weight now or after the birth? I'm halfway through this pregnancy. Any wisdom?

I personally wouldn't try to loose weight but maybe try to be a little healthier.
Less crappy foods, more fruit and veg, more walking/swimming if possible.

Unfortunately I can hardly walk due to SPD in pregnancy which is probably why I have put on weight. I have cut out the (minimal) crap I was eating over Christmas. Maybe weight gain in pregnancy has just come as a bit of a shock to me!