just got asked if I'm pregnant!

Don't sweat it. I got asked the same question several times prior to my diagnosis and treatment. I was retaining a lot of fluid due to the systemic inflammation I had. Turns out my kidneys and liver were having a hard time processing all of the toxins that Lyme was throwing at them. My favorite response was "No, I'm just fat" and watched their responses. People don't realize how rude that is and how hurtful it can be until they are called on it no matter how well intentioned they are. One person who asked was even my doctor's office manager. I was in a doctor's office...she coulda guessed there may have been something else going on. At a size zero you are far from looking pregnant my dear! Wear what makes you feel good and enjoy the wedding.

Aw thanks for the kind reply Daisy's mom. Really helpful. I think I was just really surprised, and it made me more self-conscious than I would usually be because I'm already feeling really scared about the cross-country flight and four day wedding... I just know I'm not going to be able to participate as much as I/others would like. I'm telling myself that as long as I can manage the main events, do a decent job of performing, and I guess not look like my "pregnancy" is tooooo far along, I'll call it good.

It's so difficult to know which experiences to take on. This is a dear friend's wedding so it's so important that I'm there, but I'm just really scared that by my connecting flight I'm going to be in really bad shape.

Oh, I've been asked several times too. And children have no limits too, they just ask if there is a little on in there or just say 'you're belly is fat'. If they have passed a certain age, it's plain rude, and I say them to better use their manners.
If an adult is being rude, I just answer the same thing Daisy's Mom answers: 'no, that's just fat' or 'no, I'm just fat'. The look on their faces is priceless.
In fact, it's not even fat, it's just because of inflammation...