Dear Sonia,
Welcome to the Wefugees Community and I am so sorry to hear what you have to go through!
It is absolutely right to seek help in your situation!
My colleague was providing very useful information in two threads where people have found themselves in a similar situation. Please follow this link and check also this thread. He explains in the first one:
"If your partner is not willing to leave and you feel unsafe and have no other place to go, you can be housed at a women’s shelter (Frauenhaus). These exist throughout Germany. They will provide you and your son with a place to stay and your partner will not be able to find out where you are. The staff at a Frauenhaus will also assist you with other day-to-day matters and bureaucracy.
Here is a site you can search all over Germany in English for such a place:
https://***.frauenhaus-suche.de/en/?jumpto=searchResults&cHash=9984fd0e661a53907dfb5d70ff4fdffe
If you feel in immediate danger, you can always call the police on 110."
I hope the advice from these two threads helps and please don't hesitate to get back to us with any further questions.
I wish you a lot of strength and all the best,
Meike