Feeling anxiety and depressed. Problem!

Iam 20 years old .As iam stressing about for more than two years .my past issues declines about my mental health. Every day my brain comes out with a intrusive thoughts and and yesterday issues . I forget everythinga day  before .I couldn't get proper sleep and the every day end with bad mood swings .As iam could not concentrate on one topic for more than half hour and can't control my mind from thoughts,past issues, stress etc. As this is happeningg   for more than 2 years .Due to this I feel vibrations of the nerves both sides of the fore head near the ears,I can feel the vibration of the brain in my head .If it prolong for a long time will cause a any dangerous condition to my health please kind suggest to put my life on the correct way and come out of this problem