PLEASE HELP!"""""""depression and anxiety?

I have been severly depressed and having anxious thoughts and sad and alot of sweating irritation and bothersome...sleep problems..nightmares..alot more...is it common to have brain zaps or brain shivers...I fill as if I am going through withdrawal symptoms ..I do take lorazapam but been taking it for yrs"" but alot more lately because my anxiety gotten worse...please help any advice???? Thankyou for ur time..