Hi I Have Been Prescribed 150 Mg Lyrica 2 A

Hi I have been prescribed 150 mg lyrica 2 a day for the past few months for back pain and anxiety iv been off them since Monday I get hot flushes cold sweats and my skin starts to itch really bad and can't sleep because of the itching what can I do for that late at night and at night it itches really bad I haven't really been eating much I tried something small just to keep my strength iv been drinking fluid have been feeling nausea how long more do I get this side effects for