Go to a doctor.If you really can't hear anything,you could have a ruptured eardrum.If you do,it's not that big a deal.They heal on their own but you can't hear anything out of the ear for a while.Hope it helpeddd:)
It's most likely impacted (stuffed up) ear wax. There's a product called "Cerumenex" which has drops and an ear syringe (be sure you get the kit with the syringe, not just the drops). You put the drops in your ear for a couple days, then use the syringe to flush the wax--complete instructions are in the kit. For most people, it's all you need, but in a few cases, it takes a Doctor to get the wax out.