Energy drinks consumed in such high quanities and in such frequencies are absolutely HORRIBLE for your health. The caffeine raises your blood pressure and if you ingest caffeine so often, your body will naturally adjust to having a higher blood pressure, so even when you haven't had any caffeine, your blood pressure will still be high. I have this problem and I don't consume energy drinks nearly as often as you do.
Large quantities of caffeine can also lead to heart palpitations, and studies say that mass consumption of energy drinks can lead to heart attack or stroke.
Bottom line is that energy drinks are horrible for you. Having them once in awhile seems to be fine, but drinking 2-10 cans a day, every day? You should definitely try to cut back on your intake and definitely see a doctor. You could have some severe health issues building up.
I'd also try to cut back on the pepsi, so much carbonation and acidity between the soda and energy drinks is horrible for your teeth. It wears away the enamel and leaves you more vulnerable to cavities and other such problems.
Energy drinks also put your kidneys into overdrive and cause them to filter out as much water as possible, thus dehydrating you. That could definitely be adding to your fatigue and problems, so try to drink a lot of water as well.
Main points here: Cut back on the energy drinks and soda, drink more water, and see your doctor.
Hope this helped! Any other questions, feel free to PM