I Feel Really Heavy

As my tummy is getting bigger, I feel really heavy. I find it hard to walk fast and extremely difficult to get up when I am in a sitting, squatting or lying down position. My baby should be around 2kg by now. When I get up from a lying down position to an upright position, I even have to lift my tummy with both my hands, otherwise my tummy will tighten or harden again. I am only 31 weeks+ preggers and I am sure I will find it even harder to move about as my pregnancy progresses. I can't imagine how difficult it is for women carrying twins, triplets or more babies to move about during their pregnancy. Chin Nee, all the best to you!