Lets say that hypothetically I am on my second week of a Test400mg and deca400mg a week cycle and am using Letro at .5mg ED. I am experiencing major exhaustion. Can it be because of low estrogen levels even at such a low dose of Letro? My diet is in check, I am working out hard, and getting at least 6-8 hours of sleep per night. This sucks because it's hard to get pumped at the gym when really I feel like sleeping on the bench between sets. And yes I am doing cardio 3 times a week in the morning for 40 minutes. Any suggestions?