Fatherhood for German baby

As parent of a German citizen (which the baby will be by birth) you have a right to stay in Germany.
I am not sure how this works before birth, so you should consult an immigration lawyer. (If you cannot afford this, apply for a free consultation voucher - "Beratungsschein" - at your Jobcenter.)
In the worst case, you need to go to Poland and apply for a family reunion visa from there after the birth.

Thanks beppi for your reply
I have lawyer also. I can't go back to poland because I don't have valid visa to stay there.

If your asylum application is not valid in Germany (because it was not the first EU country you reached), you also do not have a valid visa for Germany. But after being sent to Poland, you can applky for asylum there. This is the legally correct way to do things, although I understand that your personal priorities are different now.

If you really father a child then you can prove it with a DNA test. You don’t need any help to do that. If what you say is true. But your profile shows you are from India so I don't understand how you expect to get refugee status. India has poverty but no conditions to warrant one being a refugee. And you have to apply for it in the country of arrival in the EU, which sounds like it was Poland. That Poland didn't grant you the status means won’t get it elsewhere in the EU. I want to be careful not to make assumptions but it sounds l like you have tired multiple strategies to fraudulent get residency in the EU and now you are asking for help to try another strategy.  If you’ve then found a woman to go along with your strategies then nobody can do much about it but you are pretty much on your own. If a woman has let you impregnate her then you can easily prove it. If you are just falsely claiming to, then you cannot prove it and nobody can or should help you. Neither I nor anyone here is allowed to assist you to scam the system. Maybe you should go back to India or find a real basis to be able to immigrate like learning a sought after skill.