Hi there - I echo what Misty says above. Your belly will shrink when the swelling goes down and so will your stoma. I am wearing a pair of "lazy pants" right now that I couldn't fit in after my surgery b/c my belly was so big. Just give it some time.
I prefer a one piece system, but we are all different and have different likes as far as our bags, cleaning style, emptying, etc.
I did a major cleanout of my closet. And for a shopper like me, it was a great excuse to buy new clothes! I love maternity pants/jeans that have a big stretch panel that comes up over the belly. They are soooo comfortable and don't bind around my stoma at all. Plus, they hold the bag in place so it's nice and secure. My signature look is a short dress with legging or capri leggings underneath. Again, holds the bag in place and provides me with some extra security without being binding. This look works in summer with sandals and winter with boots. If I want to wear a shorter dress without leggings, I wear cotton bike shorts underneath.
I empty into the toilet. Too much work to fuss with rinsing out a basin or cup. Besides, if you are drinking enough water (which you should, you need to be really careful about dehydrating!), you will have to pee every hour anyway like I do, so you are already sitting down anyway!!
You'll find your way. Keep on feeling good and get plenty of rest.
- Amy