Congrats! I am having an unexpected #6 as well ... I understand you wanting to get used to the idea before having to put up with everyones reactions.

When you are pregnant your bowel slows down and you can get quite a bit of bloating and since your tummy is a bit tired the muscles aren't as great at hiding it. Make sure you keep up your fibre and stay away from processed foods and keep your fluids up to avoid constipation.

Best of luck with it all!