Um, AP courses are DESIGNED TO BE STRESSFUL. They are high-stakes courses with a college level test attached in order to substitute the class for college tuition if you pass. We have kids at the HS I teach at taking 6 AP courses a year.
My middle son scored 5 on all AP tests. Graduated with a 4.33 GPA from high school and enough college credits to be a sophomore on day 1.