I started Effexor in September and have been slowly upping the dose. At 75 I felt a bit better for about two weeks, but then not, so up to 150. Three months in... so so so nauseous, so Dr upped to 225. Nausea has gone away, but I'm so so so tired. I'm sleeping 10-12 he's each night and feel groggy all day. Driving is stressful as all I want to do is close my eyes. Its been almost two weeks. How much longer might this last?