Please help me,thank you very much.

I am living in china.a decade ago I finished my oversea study and earned a japan collage degree,then I came to china.I found that I seemed I can not understand Chinese,and I can not understood what happened around me.I could not communication with Chinese normally.now I am in confusing on family relationship.and I always felt have some trouble over using internet,even I seemed can not understand Chinese banking system.I felt that I maybe lost my common sense with I living condition.I do not what is happen.but I want to change to I think normally positive living condition.I want to rebuild a common sense by studying in USA and living in another condition.Please help me,I do not know what will happen to me,If recent situation proceed.I hope have a change at my life.