If I feel bad for my sins and I wish I could go back and never do them again and I try to confess to god my sins but I feel empty inside I should feel sorry but all I can feel is regret I guess but mo?

You cannot got back and change what has happened - These are shadows of your past. However, you can learn from these and in doing so make it a positive change to help others and where you can do that little bit extra to help someone who needs help.