Bloating....maybe??

Jory
Hi ladies. So, I'm only 4 weeks 5 days and this is my second pregnancy. My daughter will be 10 in December, so it's been quite a few years since being pregnant. With her I didn't "show" until around 16-17 weeks along. I hear with subsequent babies your uterus stretches easier and you show sooner. But this early??  No way!! I know I'm bloating majorly and that's it's normal but geez....anyone else have this happen and look bigger this early? Dr scheduled a sonogram for at 6 weeks and told me my uterus is measuring 2 weeks bigger than my dates suggest. He asked if I had an a typical period (implantation bleeding) and I said no. I am 100% sure on my dates as my husband is away a lot for work and he came home 2 days before AF ended and left the day before ovulated. So I know For a fact my dates are accurate. I weighed in today at 112.8. So my weight hasn't changed but maybe by half a pound. 
Thanks for any similar stories/experience or info :)