A lot of people these days claim you can't overtrain while on, but I think it's very possible. Maybe you are doing too much, going beyond what your body can handle.
I can take 2grams of test a week, and 110mg of d-bol a day, but if I go to the gym more than 4-5 times a week, I overtrain. If I do briefer, more intense workouts 3x a week, I grow. I've tried it all, hst, volume, hit, etc, etc. I've been upwards of 300lbs, and I only got that way by listening to my body. Yours is telling you that you need a break. You have to find what works for *your* body, and from the sounds of your symptoms, what you are doing isn't working.
I'd also look at your nutrition plan. A lot of people think they are eating enough, when they really aren't. You need plenty of calories to grow. No, that isn't an excuse to go to wendys every day, but you do need tons of food. Drink some whole milk, eat some whole eggs, it won't harm you.
Take a few days off, just relax. Three or four days away from the gym won't kill you, but it will certainly help you. Cut down on some of your sets, or exercises (for back day, the deads, rows and chins are all you really need. The rear delts get plent of work from the rows and deads). Up your calories too, and you'll be growing like a weed.