Pregablin withdrawal

I’ve been taking 600/900mg of pregabalin for a month for anxiety/sleep reasons. I don’t want to take it anymore. Last night I didn’t take it. I couldn’t sleep till 8am despite getting into bed at 1am and reading/trying to relax etc. I slept for 3 hours. I have loss off appetite haven’t eaten at all and don’t feel hungry strangely How long do you think this’ll last?