When you feel pressured, you can talk to your teacher, family or classmates and ask them for useful advice. When you encounter troubles, you should try to avoid closing yourself up and actively seek outside help.
Very vital that you communicate and let somebody know about it, because if you keep it to yourself then you would never be able to come out of it unless you know the perfect solution. But letting others know will help you know how to overcome or avoid such situation and also know if it was your mistake that lead to that stress point.