Thank you for reaching out to us again and sorry for the wait, I haven't been able to check the platform during the Holidays.
Let's have a look at your questions separately.
1. First of all, where are you able to live with your status:
If you say that your girlfriend has been granted national ban on deportation §60 V + VII AufenthG and you have been granted subsidiary protection §4 AsylG, both of you have a residence permit for (at least) one year. You do not have to live in a Wohnheim, but are allowed to find a flat to live in. According to the Flüchtlingsrat Niedersachsen, the Jobcenter or "Sozialamt" (social services office) can also pay the rent if you earn little or nothing. Click this link for a few ideas on where to find housing.
Flüchtlingsrat Niedersachsen information on living and moving with subsidiary protection (German): https://www.nds-fluerat.org/leitfaden/10a-fluechtlinge-mit-aufenthaltserlaubnis-nach-25-abs-2-satz-1-alternative-2-aufenthg-subsidiaer-schutzberechtigte/10a-2-wohnen-umziehen-und-reisen/
And on national ban on deportation (German): https://www.nds-fluerat.org/leitfaden/11-fluechtlinge-mit-aufenthaltserlaubnis-nach-25-abs-3-aufenthg-national-schutzberechtigte/92-wohnen-umziehen-und-reisen/
Just be aware that a so-called "Wohnsitzauflage" applies to anyone receiving a status since 01.01.2016, which means you have to stay in the Federal State in which you received your residence permit for the first three years. There are ways to apply for a cancellation, if you are accepted for university/ education purposes or a job* in a different Bundesland.
The local counselling centers in your area will be able to help out with questions around living in Germany and your rights as well.
Here are the ones I could find in Winsen:
Arbeiterwohlfahrt Flüchtlings- und Integrationsberatung
21423 Winsen ( Luhe )
Herr Erk Jessen
04171/84 89 00
04171/84 84 657
Haus der Diakonie Winsen
Im Saal 27, 21423 Winsen (Luhe)
Tel. 0 41 71 / 69 26 0
2. As for your second question, the situation you describe seems confusing. What exactly do you mean by "for the past two months while we're not on papers"? Also, you two are not married and the Ausländerbehörde is confusing that?
Since your girlfriend is pregnant and doesn't have a job, there are special regulations and she should be entitled to receive financial support. There are probably different amounts of money you receive, depending if you are alone or in a partnership. Maybe this information sheet in English helps out, see page 32-36. Once you have your child, you are also able to receive child benefits.
I hope the sources I linked here can help out a bit, definitely try and contact the counselling centers for more help in person (they might be away until January 2, 2019!).
Of course you can reach out to us again if you need any further assistance.
All the best,