How can I truly trust Allah to protect my husband in prison?

Assalamu alaikum, my brothers and sisters. My husband is locked up, and I'm struggling so hard with tawakkul. I'm terrified something will happen to him in there-he's in a violent place, and he's not a fighter. I keep imagining the worst... that he might be hurt or even killed. And the more I worry, the more I fear my thoughts might somehow make it happen. Is that even a thing in Islam? Like, does worrying too much attract bad things? I make dua constantly, begging Allah to keep him safe. I know Allah is in control and whatever He wills will happen, but I'm still consumed by fear that His will might be his death. I don't doubt Allah's power-not at all-but I feel so weak in my trust. Just yesterday, we got news that visits and calls would be cut off for weeks. I was devastated, praying between Asr and Maghrib, crying and making dhikr. Then suddenly his mother called-he was on the phone and wanted to speak to me! SubhanAllah, it felt like a miracle. But I still feel guilty because even after that, I'm worried. He said someone helped him get the call, which means he owes a debt in there, and that scares me too. I call on Allah by His names Al-Hafiz and others, knowing He is the Protector, yet my heart won't settle. How do I build full tawakkul? How do I have complete yaqeen that Allah can shield him? I just want to be certain that he'll come out alive and well. Sometimes I think maybe that call was a last chance to say loving words... I don't want to let Allah down by still worrying after such a blessing. Please make dua for him. He deeply regrets the mistakes that put him there. Jazakum Allahu khayran.