I Regularly Take Hot Yoga Classes And Feel Great. Am

I regularly take hot yoga classes and feel great. Am able to do deep forward bends etc. Well toniglht every time I bent over 8n yoga class I felt like vomiting. This has never happened to me before. When I felt like the hole was about to come up I finally left class.
I've been 2 hours now. I'm all bloated and slight headache feel like I need to poo but cant. Nauseated. Having peppermint tea.burping.