Well, it’s hard to be forcibly jollied out of responding to a situation that felt pretty clear to you, when you were the only one there out of all of us on this thread.
I don’t want to add to that weight of doubt, so I’ll just ask this once in a super kind and positive way, as someone who has had the horror of being mistaken for being pregnant as well, which I suspect a lot of these posters just cannot comprehend 
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Anyway, let me ask you... do you honestly think you read the situation so totally wrong that there’s any room for doubt?
And as a separate question, could the other women be sniffing and tutting in jealousy at you getting to go to the top of the queue, and nothing to do with any thoughts of pregnancy, either way?
Anyway, poor you is the main thing here!!! Living through moments like these are absolutely rubbish, real low points.
But you know what, there will be better moments in life than these.
You need to love your body, in order to change it. Don’t love it’s shape now, that’s ok, but love what it done fir you, the journey you and it have travelled through together, how it’s been battered and pushed to its limits, and how it’s been with you every step of the way. You give it some love, and then maybe you can give it some more love and spoiling it by giving it lots of healthy wonderful tasty food to eat, and not rubbish. And then maybe, you’ll find it easier to lose that bit of weight.
A weight loss journey that starts in self loathing and hatred is a very hard place to get motivated and move from (I know it really I do!).
I wish I was like a colleague of mine who just shrugged off a mistake like this with fabulous aplomb, but it takes a great relationship with your body, and not caring about what others think. I think you and I both have a while to travel until we get there, but you’ll get there, I’m sure. 