if you are working to save your marriage then you should not have a trial separation, all that will do is give a message that you are getting ready for divorce.
Is this what you want?
Recovery takes many months to years.
You both have to work on the recovery and you may have to lead this if your husband is unwilling.
Bear in mind you had an affair, not many betrayed spouses suddenly awaken to a new world , your husband will be hurting and holding it in , he will be confused and not know what he should do next. You are expecting him to start making changes because you have had an affair. His mind will be all over the place and it is likely he has no idea what to do or even say,
To help you recover do some reading, lots of reading:-
Go to the Marriage Builders site and read their articles
Articles
Two books that will help you are
"his needs her needs " and Surviving an affair" both by Harley