worried about my husband

Top and sides of his head hurt all the time, he feels foggy all the time, always tired, overall body aching, very moody because he feels like shit, he feels like he can't remember stuff as well as he used to, he said he's been seeing like black spots. The back of his ear has been swollen since we got back from vacation in feb. Should mention, he has thyroid problems, he was on medication for so long but he looked up the side effects and realized he's had the side affects for years listed under "if you have any of these symptoms, contact your doctor immediately." So he hasn't been taking the meds. His symptoms seem to be getting worse and worse. What do I do? What does it sound like? Do we send him to the doctor anyway and have to pay a ton? I'm just so worried and he is to.