Hi, I work for a TMD specialist, and I myself am wearing a lower splint. The purpose of the splint is to open your bite, thus alleviating the compression on the nerves that run to your ears, temples, neck, back, ect. So if it is hurting you more now than before is a little strange to me. The splint may have your bite open too much, and may need to be adjusted. You may want to call your specialist and let him know whats going on. It wouldnt hurt a bit to call, but it may hurt if you dont. Hope this was helpful!