[sheepeck]

Looks to me like reverse block of sinuses I had two years ago.
It was so painful that I almost wasn't able to ascend to surface - I had to hold on the mooring line and go up slowly. Luckily I wasn't deep so I had the time to be slow.

But, what's different from your experience - I felt a pain already on the way down. But - the pain location seams to be the same.

Reason of the pain was air stucked in sinuses when they somehow blocked and din't let the air go out during ascend.

At that time I didn't take any medicaments, nothing, but wasn't able to dive for more then week - my sinuses were blocked whole time.

So - I cannot say why it happen to you and what to do to prevent it from happennig in the future. You said nothing about beeing cold and so on and that was my problem at that time. So I hope someone will write here something we could learn from.

Hope you won't have that experience again.

Petr