Hi @Misayko
Pregnant women are protected from losing their jobs according to a rule called ‘Kündigungsschutz’. You do, however, have the obligation to inform your employer of the pregnancy. Here you can read in detail about this protection (in English via online translation):
https://***-kanzlei--hasselbach-de.translate.goog/blog/kuendigung-und-kuendigungsschutz-in-der-schwangerschaft/?_x_tr_sl=de&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=wapp
As your partner is not here in Germany with you, I recommend you ask for some help from the advisory services for pregnant women called ‘Schwangerenberatungsstellen’. These services are free, confidential and can be found throughout Germany. You will usually be able to find someone there who speaks English. They can, for example, assist you to apply for the special financial support from the ‘Bundesstiftung Mutter Kind’. This support is especially there for expectant mothers who have difficulty accessing standard social welfare benefits. This would apply in your case due to your residency status.
Here is a brochure about this support:
https://***.bmfsfj.de/resource/blob/94020/4e026962bf90f9906a7be64a692b4f3f/infoblatt-mutter-und-kind-englisch-data.pdf
You can search for a pregnancy advisory service here:
https://***.bke.de/bke/beratungsstellensuche
Based on your description, I presume you have the residency permit 16d. If this is the case, you will be entitled to Kindergeld (child benefit) and Unterhaltsvorschuss (single parent allowance) after the birth of the child. You also may be entitled to the benefits Elterngeld and Kinderzuschlag based on your income and work history. Receiving these benefits does not affect your residency status.
Best,
Éanna