Mine slowed down, thank goodness, only put on a couple of pounds in third trimester (so far, approaching 39 weeks) and not eating any differently. Bump has been getting bigger though so hopefully is sucking some of the fat out of my hips and thighs! Most weight gain was in first trimester from eating greasy carbs to fend off nausea.
Statistically you put on most of your weight in last trimester as baby bulks up, but every pregnancy is so different.
I wore my normal clothes right up until about 32nd week and had lost weight, then put on 10lbs in about the last 6 weeks but my sister put on loads of weight at the beginning and was in maternity clothes from about 9 weeks!
So long as you're being sensible about eating I truly wouldn't worry, you lose about a stone just giving birth (baby, fluids, placenta) and then breastfeeding is brill for weight loss, I lost another stone in about 3 weeks...another incentive to BF if one was needed!
I hardly put any weight on in third trimester. Mine was mainly in first trimester and early second trimester when I was ravenous. By the third trimester my appetite was really reduced and so my weight gain has been negligible. I have even lost a bit of weight in the last week. I am 40 weeks today. 10 kgs at 32 weeks doesn't sound like much at all. I think they say between 12-16 kilos is perfectly fine.