My husbands porn addiction has destroyed me

I’ve never really discussed how deep this issue is. I’ve told my husband some of it and a friend of mine but never in detail because I’ve been so embarrassed of this probelm I have. My husband and I have been married a year now and together 4. He’s an incredible kind hardworking man. He’s the sweetest and takes excellent care of me. But he has struggled with porn issues in the past. We’re now both strong Christian’s and have overcome that problem. But it’s given me really terrible self self esteem issues. I don’t know exactly when it started. I’m guessing 2 years ago but it’s only got worse. Everyday sometimes 2-3 times a day I look up his past partners on social media. I mean every platform , facebook instagram tiktok twitter. And look at every photo every post every comment every tag. Everything. I even look up all their family members just to look at pictures of them or find more information. This happens really 2 times a day everyday and has only gotten worse. I don’t know what to do. He’s never even talked to any of them after they stopped talking, never hinted at them in any way. But once I found out his problem it’s just made me so insecure. I’m constantly searching to see if they have better bodies, personalities, I don’t even know. It’s seriously destroying me though. It’s resulted in me having painc attacks, I’ve lost so much weight from it. It’s destroying me inside and out. What is wrong with me ? I’ve never heard of anyone else having this problem.