four_engines:Thanks everyone. I called DAN and spoke to the registrar. According to him, with the symptoms exhibited, it sounds like a case of barotrauma of the middle ear, which would resolve itself over time (phew)... It's not a case of DCI.
And yes, I've learnt that it pays to obey my dive com now.
I hope you have learned to plan your dive and dive your plan without having to rely on a dive computer to do it for you!