I can relate to how you feel Sam. I'm trying to hold on to promises as well as an instruction and dream God gave to me many years ago that has yet to come to pass. It hasn't been easy holding on and not giving up. Thoughts of depression and even suicide crept in at one point. But I stood steadfast regardless as the Holy Spirit renewed my inner strength to keep me from not throwing in the towel. I know it's hard but try to press on. I believe God will reward our faithfulness, obedience, sacrifice and stewardship when the time is right for Him to do so.
Sam I don't think you need prayers for this situation as much as you need to take time to stop, think and smell the roses. You need to assess what is causing you all this stress and then work on a plan to address the issue. Go to a beach and swim and frolic in the ocean or go to a park and enjoy the scenery while walking. Whatever it is you like to do you need to do that when you are off. Unwind your mind during your downtime and you will feel loads better. You can event treat yourself to a spa day and get a relaxing massage. That will definitely help you remove the physical effects all the fatigue and burn out has brought upon you. All the best to you.
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Praying that all will be well with your husband as you asked for. In Jesus' name.