Hi Laura,
i think that we have so many unrealistic media pictures of perfect mums (who have personal trainers, chefs and sly tummy tucks after) that we think we should look perfect like that too. If you look at everyone here with no top on you would see LOTS of stretch marks and flubby skin trust me. I have been pretty slim but have retained a belly since my second baby so I have had lots of people ask me if I am pregnant when I wasn't!!! With my last baby at 20 weeks people were asking how many days I had left!! So if you are small enough to not look mega pregnant at this stage you are doing a fabulous job. I bet you are beautiful - just think of the wonder and forget about reaching for unrealisitc goals. In the end you just want you and your bubba to be healthy.
Stay strong and feel beautiful!!