Can stress overload cause mental burnout and anxiety. was overloaded for a long period of time and felt like hit the wall. given ?

Absolutely..: If you are experiencing acute anxiety one simple technique you can use is deep breathing exercises. Breath in deeply & slowly through your nostrils. Fill your lungs (but not to the point of discomfort). Hold air in lungs for a five count. Exhale slowly through an open mouth. Don’t focus on performance – just focus on your breathing. Repeat x at least 12. Or look up progressive muscle relaxation.