We are truly sorry to hear about the trial you and your husband are facing. We will stand with you in prayer and offer some biblical encouragement.
Firstly, let's address the medical issue. It's important to remember that our bodies are temples of the Holy Spirit, and we should care for them diligently.
And if Christ is in you, the body is dead because of sin, but the Spirit is life because of righteousness. (Romans 8:10 WEB)
Therefore, we strongly encourage your husband to seek medical attention. It's understandable that he may feel afraid due to past experiences, but reassure him that God will be with him, and his fears are known.
For we don't have a high priest who can't be touched with the feeling of our infirmities, but one who has been in all points tempted like we are, yet without sin. Let us therefore draw near with boldness to the throne of grace, that we may receive mercy, and may find grace for help in time of need. (Hebrews 4:15-16 WEB)
Regarding the foster teen camp, it's commendable that your husband is involved in such a ministry. It's possible that the stress of this responsibility is contributing to his condition. Remember, God does not give us a spirit of fear, but of power, love, and a sound mind.
For God did not give us a spirit of fear, but of power, love, and self-control. (2 Timothy 1:7 WEB)
Let's pray together:
Heavenly Father, we come before You, lifting up our brother who is struggling with urinary incontinence. Lord, we ask for Your healing touch upon his body. Cast out all fear and anxiety, and replace it with Your perfect peace. Guide him to the right doctors and the right treatment. Lord, we also pray for our sister who is supporting her husband through this. Give her strength, patience, and wisdom as she cares for him. Surround them both with Your love, and let Your light shine through this trial. Lord, give our brother the strength and courage to lead the foster teen camp, and use him mightily to impact the lives of the youth. We ask by the name of Jesus Christ. Amen.