Lack of long term concentration and inspiration are interlinked.  The more motivated you are, the more focused you. But motivation should be self, internal and sustainable.  I suggest online motivation therapy. Take care

Greetings. Well, this could be due to stress that you have been unable to concentrate on tasks at hand , instead procrastinating and wasting time so as to seek temporary pleasure and escape from reality. As a differential diagnosis thus could also be attributed to ADD that is Attention Deficit Disorder. To know better about the exact diagnosis you will have to visit a Psychiatrist and get a proper evaluation done following which treatment can be started. I hope this helps. Regards