sd6--I sympathize with you. My D has her scheduling meeting tomorrow, and is facing similar challenges--plus, her Christian school requires Bible as one of her 8 classes, and four of the AP courses are double blocked.
Here are some ideas to consider. Health is offered online; one of my daughter's friends found it very doable. Perhaps you could choose to take either Macro or Microeconomics, but not both, since apparently only one semester of economics is required. (If you don't plan to major in economics, I would recommend Macro as being more relevant to your life; I'm a former economics teacher.) And, at my D's school, students can be exempt from gym if they participate in enough outside athletic activities, such as a varsity sport or a nonschool sport; maybe that would be a possibility.
I hope this is helpful to you.