Hi, I'd like to help you with your question.
It is so good to hear that you and your husband have worked together and changed your relationship! Kudos to the both of you. It takes work and commitment to take something that could end a marriage and turn it completely around and into something good.
And congratulations on your weight loss!
It is normal after being hurt by your husband's affairs that you would feel scared, anxious and stressed about having him go back into the same situation that he was in when he cheated. But keep in mind, you have a completely different relationship with him now than you did before. It is not the same. And he has made an effort to stay with you in the marriage. Men who cheat don't make such efforts unless they want to stay in the marriage. He would not put in the work and grow so close to you only to throw it away for an affair. There would be something drastically wrong with his personality to be able to do that.
Have you told him about your fear? That is a good way to address how you feel. Allowing him to carry some of the burden of what he put you through is natural too. He needs to reassure you that this time is different. He also should find ways to comfort you. He can contact you when he can, write emails, or send something home to remind you that he is there for you and is not cheating. Reestablishing trust is important.
Keep the lines of communication open and you should do just fine.
I hope this has helped you,