Welcome to our community and thank you for your question.
I don't think that your plan of applying for asylum in Germany is going to work. German authorities will do the same thing as the Netherlands. They will check back with the European database where they collect fingerprints of migrants and asylum seekers. And they will also find out that you got registered in Slovenia. Therefore, you will be send back there.
That doesn't mean that your asylum application got rejected - it just means that neither the Netherlands nor Germany are responsible for your case. You will be given the chance to tell Slovenian authorities about the reasons of your flight and the condition of your child.