Why not address why you feel like crap lately before investing in supplements?
Is your diet in check?
Is your sleep in check?
Are you able to maintain good intensity in the gym?
It doesn't matter how many pills or powders you throw in the mix. If you can't fix why you feel like crap first, nothing is going to "Supplement" a bad diet or training program. Especially if your external factors (Sleep, digestion, stress) are not in check.