Is it okay to give blood if you've had the shingles virus and still feel pain?

I am 17 and want to give blood at our local blood drive in about a month, but I had the Shingles virus about a year ago. Is it okay to still give blood? Why do I still feel pain in the location where I had the breakout? Is there anything (medication or something) that can make it go away? It only happens now and then not all the time...