I can't judge emotions, but I find shame such a complicated emotion to deal with. And when it comes for me, it's almost alway covering another much more constructive emotions. Do you think you could try getting 'beneath' the shame feeling? It works for me. Sorry if this answer is a bit confusing, but it's such a complicated emotion and hard to explain.

But you have nothing to be ashamed of. We all came into this world as equal beings and we can choose to be good or bad. I think you are a good person and if so you have nothing to be ashamed of! Not even the mistakes everyone makes.