I am still very new in my reconciliation journey after DDay so I do not often post on other threads, but this really resonated with me. Your feelings, thoughts, emotions, etc are ones that I have felt so strongly over the last several months as I prepared to disclose and in the two months since. You can read several of my threads where I was feeling like I could never feel any peace or happiness. 
To be sure, I still have my struggles; however, things are getting much better. You will find support in this community and one of the most helpful things for me was realizing how many people have walked this same path to come out on the other side in a place that is better than they can imagine when you are at this stage. Hikingout is the best and has been a great support.
I have been in IC for the last several months and that has helped me deconstruct issues that predate my marriage and affair, but were contributing factors. Understanding and working to process those has been helpful. Everyone is very different, but would highly recommend IC if available.
On my walk with my wife yesterday we talked about your exact issue believing if the BS really wants to reconcile. I told my wife that when I am at my lowest I can convince myself she is only staying until I get more stable and then she is going to tap out. I know that is not true, but when you are in the middle of those low points your brain can go to dark places. My wife is supportive, but was clear she needs me to believe her so I can focus on how we can both heal rather than me crawling into my shame spiral. Sometimes easier said than done, but I can honestly say that that part is getting much much better and I am only two months post DDay. 
I do not ever see a time when I will not feel sadness, guilt, and remorse when I think about my infidelity; however, my wife and I often talk about how this will become a smaller and smaller part of our story going forward. It feels heavy now because everything is so fresh, but even over the last two months I see progress. I have read enough on this site to know reconciliation can be successful when both people are working on it. We have tough days and hard talks often, but I can honestly say I see us in our early days of healing. 
You are not alone and I think every wayward has felt the strong negative emotions you are feeling. Keep posting and keep open lines of communication with your husband. Reconciliation is a gift (the most precious gift I have ever been given) and I am working every day to accept and not squander it.
 [This message edited by feelingverylow at 3:11 PM, Friday, October 31st]