You can try to put your self into a calm mode and just relax and breath Hope this helps :)
Answer:as cheese, yogurt, lactose-free milk, or calcium-fortified soymilk (soy beverage) or to consume the enzyme lactase before consuming milk, Calcium choices for those who do not consume dairy products include: • Calcium fortified juices, cereals, breads, rice milk, or almond milk, Canned fish (sardines, salmon with bones)
Explanation:
Im guessing walking because you walk between classes.