I am not sure what your airlines procedures are re sickness etc, however I can gaurantee you that they wont say "Hey XXX, thanks so much for risking your ear drums by coming to work yesterday, we really appreciated it". If you genuinely know you have gone downhill today, and are having trouble unblocking your ears, think how you will feel tomorrow at 40,000ft with a cabin full of hungry punters enroute to god knows where - you will wish you had called in sick.
Your health is priceless - based purely on what you have described, I personally wouldn't be risking it.
Good luck and get better!
PS Is there not any 24 hour doctors clinics you can get to?