Hey guys would really like an opinion on an issue I'm having.Not long after my sound exposure in 2014 I started experiencing pops in the back left hand side of my head.The pops have since stopped but there is still a constant pressure there and the feeling of water being dropped onto my head in that exact spot?I've ruled tension etc out so what could it be?I have experienced sudden vertigo rarely and nystagmus(eyes move to sound)very rarely.Any ideas?Thanks.Stephen.