Personally, i agree with the previous posts re pre-installed ethics/views that conflict with what you are doing now. I don’t think that anyone can say anything to you that would negate any ‘bad feelings’ that you may have, any guilt, etc.
I think that it is a timely process - some may take longer than others - depending on your background and who taught you what, what methods, etc
If you change your behavior (practice anything other than what you’ve been doing) then it will inevitably change your personality and feelings… and your moral perception… that’s my opinion.