I've never felt so insecure 😟

So one of my good friends is having a cocktail party for her birthday tonight. I would normally be so excited to participate but I'm 28 weeks pregnant, can't find anything to wear (I have cocktail dresses, but none fit ☹️).... I don't feel ugly but just not very comfortable to mingle and talk about life because I'm also insecure about not having a job right now as I have to pass my real estate exam.... my fiancé is a little insecure too. He's put on weight and needs new slacks and shirt, can't really afford that right now either... plus, I'll be in a room full of gorgeous girls I know from my high school and college "party" days.. super model level women... like I said, if I wasn't pregnant and secure about my career and etc I wouldn't mind. Should we go? I feel so silly...