Legs feeling tight??

Ar

I’m 20 weeks today, I for some reason was way more hungry than usual and ate a ton of food today. I had to go to a rehearsal dinner and sitting there with my belly feeling so full I noticed when I stood up my legs felt tight as if they were swollen but they don’t appear to have any extra fluid on them. I think maybe from eating so much my body is trying to process and eliminate. Anyone else get like this??