Welcome to Android Central! So you were already having problems before this? Is that why you had to boot into Recovery Mode yesterday? If so, it may have been a sign of impending hardware failure.
Let it charge on a wall outlet for at least 6 hours, then press and hold Power for at least 20-30 seconds to see if anything happens. If not, then try a different charger and cable, and go through the same process. If nothing happens, either the battery or something on the motherboard is faulty -- you'd have to bring it to a repair shop either way.