Is it normal to feel exhausted after a POTS episode?

Yes! I feel the same way, like I need to take a minute to catch my breath and get back to normal. Bad episodes, I have to rest for a while because it just takes everything out of me. I'm sure you've heard it all, but lots of water, compression socks, and for some people extra salt intake helps. I'd ask your doctor about the salt though, first since there's other things to consider for that, like your heart. Best of luck!