To be stressed or to be stressed out? What is the difference between them? Do you say "to be stressed" or "to be stressed out"?

When do I have to use "shall"? Can I use it instead of "will"? Is it used in special situations? Thank you!

Earthquakes It is well known that there are many earthquakes in Mexico. We are used to them. I could say that but, to be honest I do not think people are ready for an earthquake ever. When there is an earthquake tourists come out from their hotel rooms very scared because they had never felt something like that and it is worse when the movement wakes them up in the middle of the night. I live in Mexico city and it is very scary to see how your stuff moves from side to side and some times you cannot even walk. A year ago, a friend of mine, from the US, came to visit the city. He has never felt an earthquake. When he said he wanted to feel one I was really surprised. There are earthquakes where you live?

Migraine This is my first entry on italki. Since some days ago I've been having terrible headaches. When I have a headache, my life stops. I can't read, watch TV or do my homework on the laptop. I am not even able to check my mobile phone. I've noticed that HD TVs make my pain get worse. This kind of headache is considered as migraine, which is very sad because I wouldn't like to have a kind of problem which doesn't let me work well or have a normal life. I'm thinking about getting my head checked. I hope everything goes well. What about you?, have you ever had a headache so horrible that you can't even do anything?

¿Es correcto decir "La noche de anoche"? Casualmente escuché a un conductor de televisión decirlo, ¿es correcto o es redundante?

¿Qué debo hacer para que aparezca mi cuenta de Twitter en mi perfil? Bueno, sé que esta pregunta no tiene nada qué ver con los idiomas, pero sí me gustaría que alguien me explicara qué puedo hacer para que aparezca mi cuenta de Twitter en mi perfil si me dice "Imposible acceder al servidor de autenticación de Twitter. Por favor, inténtelo de nuevo más tarde." Esta leyenda aparece cada que lo intento ¿Alguna sugerencia?