Exhausted by simplest things

I'm 30+2 today and doing what is usually the simplest of things absolutely exhausts me now.

I was grocery shopping earlier, just getting a few things for the week (total was $50) and mid way through I broke out in a cold sweat and felt faint. I actually ended up going to sit in the shoe aisle while I waited for it to pass.

This has happened multiple times with various things and I'm honestly over it.

(I'd just eaten 30 minutes prior so it wasn't that, and all my labs came back normal last week at the docs)