I would make an appt with the wc atty, or just go catch him at his office if you can. They are bad about replying to calls - many have better luck with faxes.

Do you have your own treating dr?
one with your interest at heart not a wc dr.

BUT- I am not a wc pro,
If you are in great pain- I think you can seek treatment and have it put down as a wc claim treatment and let the chips get sorted out later...

Check your state website for the workers comp division and check thru our sticky above the main threads here.

I would find a way to get a hold of your atty first, he should be able to guide you with how to deal with the HR dept.

HR dept is more on the side of protecting the company and they side more with the wc ins carrier to keep rates lower.
I learned that the hard way - don't talk to HR very much until you talk with your wc atty.