Being In The High School Setting Gives Me Terrible Anxiety But…? Programs Online?

I want to do IB. Which my high school currently offers and I can’t seem to find anywhere online–some places like k12.com have AP classes, but I can’t get any college credit for doing AP classes. I also can’t do Model United Nations outside of school. Is there any way I could do IB on-line or something?
(Before we ask, my anxiety is very real, and I’m currently seeing a psychologist about it. I probably will ask her about school, but I haven’t know this particular woman very long so I’d have to bring her up to speed first. Anyway… answer away ^A^)