I haven’t worn underwear since about 10 weeks

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So I have a big sensory problem with my clothes. I’ve had it my whole life. I can’t wear any pants below my belly button. My underwear has to be high rise as well. It’s gives me anxiety thinking about it. Whenever I was overweight, I sometimes didn’t wear underwear because I would have a panic/anxiety attack. So during pregnancy I have to wear the pants that go over my belly. I can’t wear anything else or I will start hyperventilating. So I bought a maternity dress that is knee length and kind of flowy. I was going to wear it to my family baby shower but now I am freaking out because I wouldn’t be wearing any underwear. So what would you do? Wear it anyway?