Giddiness and stabilisation problem after Padi course

Hi there,
I do have a problem with giddiness and stability problem after coming back from my Open Water Padi course two weeks ago. I do have a slight flu which i recover after two days but the giddiness does not seem to go away. This is the first time I experience diving and snorkelling. I don't have this problem before and up to now I still dont feel normal. At times, I still feel like I'm floating around. Wonder whether is it the Padi course that I went thru. I don feel it throughout my week stay while at the diving resort. Sometimes at home, while sleeping, I can still hear popping sound in my head. I have not see a doctor yet as i donno what to tell the doc too. Very strange sickness indeed. I thought it would go away after a few days..but no..still feel it today even after 13 days.
Is there anyone experiencing such thing after the Padi course and care to share how to overcome this strange sickness. Or should I see a doc.

Go to a doctor and have him check your ears. Could be a slight ear infection or something else with your ears.