Weight loss

I know my Dr will monitor so I'm not really "concerned", but it's just new for me. At 26 weeks I had only gained 8lbs and we weren't really worried because I've been eating really healthy through the pregnancy and I was a little over weight when I got pregnant (not fat, but about 15lbs over where I should be). A week ago I was diagnosed with GD and since then I've weighed myself a couple of times and since I've cut out basically all my starchy carbs and sugar, I've lost almost 2lbs. I'm 28 weeks now, I really don't think I'm supposed to lose weight at this stage, with my other three pregnancies this is when I started to gain at a faster rate.