Fantastic that you're feeling better physically, that's a huge start considering what you've been through. Now, to just let go of the nagging "woulda. shoulda, coulda's" which drive us crazy! I just encourage you to maintian an attitude of gratitude and don't look back. Enjoy and appreciate your wonderful marriage foir what it is today and you will find serenity.
Have you talked to a counselor about the feelings you've been having? That can really help. I can recommend kind, caring counselors who don't cost, if you'd like. Hang in there, friend, we're rooting for you.