How do I convince my husband to use incontinence briefs at night?

My husband has had back problems for a couple weeks. It was diagnosed as sciatica and he seemed to get better for awhile but he has since experienced more pain and has become more frail. At night he gets up every 2 hours to urinate and since he cannot get himself out of bed or back into bed that means I also get up every 2 hours. I help boost him to a standing position in a walker. One night he fell in the bathroom and we had to call the EMTs to get him up and into bed because I cannot possibly lift him. If that happens again I think he will have to be admitted to a care facility, something neither of us wants. I am getting ever more exhausted from lack of sleep and am worried about hurting myself with the constant boosting since he needs to get out of his chair every 2 hours all day, too.

I bought incontinence briefs hoping I could at least sleep all night. He wore them but insisted on getting up every two hours.

It's a holiday weekend so tomorrow he calls for another doc appointment and I call agencies to see if I can hire someone to come in at least a few nights a week. That's an expensive fix when an inexpensive fix is available but there you have it. I need to call anyway because I am thinking this could well be the new normal.

I don't mean to be just venting, though I admit I'm frustrated. I plan to talk to a neighbor tomorrow (assuming she's back) since her husband was wheelchair bound for months. This came on so suddenly when he work up with back pain one morning. I have not adjusted to it yet.