Pain when standing help :(

So I’m 25 weeks two days from being 26 weeks. Yesterday at work I got sent home because I was just in so much pain. I work in a restaurant as a prep person it’s a 8am-4pm shift I had to cut my hours because my ob didn’t want me up for so long since my ankles and feet were getting swollen. I just work 3days now and yesterday 4 hours deep in my shift I started getting this really bad pain like I literally couldn’t breathe. It’s a bad pain by my ribs, under my boobs is the most worst pain ever. It’s my third pregnancy and I’ve never ever felt this pain. What can it be 😩😭 help please.