feeling guilty about sick husband

My husband had terrible lower back pain and went to the doctor last week and was told he most likely had sciatica. He was given a prescription for hydrocodone/APAP and told he could also use ibuprofen and to try resting and using ice for relief. It has been over a week and my husband is still in pain. I know sciatica can be terrible, but the thing iis that my husband is making no effort to try to get better, at least that's how it seems to me. When I ask him if the hydrocodone is helping, he says no, his pain is unbearable. We've gone over the 1-10 pain scale thing, and he says that no matter what he does his pain is always a 10 unless he is sitting down. I feel  guilty because I guess I really don't believe his pain can be that bad. To me 10/10 is like childbirth or kidney stones or cancer. I also find it odd that although he says the hydrocodone doesn't help at all, he is still taking it and never misses a dose. He moans and cries out, yet he has the strength to hobble out to the porch to let the cat out or smoke, just not anything else. I am also worried because his breathing seems very labored while he sleeps. He is very phlegmy when he wakes and it's very concerning. He says he hardly sleeps a wink, but I know that's not true because I am watching him sleeping! I am near tears at this point. I just can't take this. I feel horrible because I really do believe in my wedding vows about in sickness and in health, and I never felt like I was the kind of person who would feel borderline hate toward a sick person, but I do. He has had heart surgery and back surgery, and both of those were a piece of cake compared to this sciatica. Has anyone been through this?