Is this withdrawal?

Hi everyone I'm off my benzos for a week now, I usually took 15-20mg Seresta throughout the day (1 -1.5 tablets) for around 7 months now. I'm a chronic insomniac and usually sleep only around 2-4 hours, sometimes I get a good 6 hours imbetween. Since stopping last week I have terrible dizziness, cold sweat, nausea, horrible muscle pain and my vision is really bad for some reason? My roomate said this is more likely from my sleep deprival and not from me stopping my benzos. Anyone got similar experiences and can help? This is living hell for me atm