Grieving after a loss during Ramadan

Assalamu alaikum. I'm really struggling right now. The stress from a recent situation led to a very difficult choice, and I'm filled with deep regret. I've been breaking down in tears for weeks, my chest feels heavy, and I can't stop thinking about it. I feel like I'll carry this pain forever. I didn't even know about the pregnancy until a medical visit. I feel completely alone and even find myself missing the man involved. I don't know if we can even have a civil relationship now. I feel so much shame and anger towards myself. To make things harder, this all happened during the blessed month of Ramadan. He has been through this before, and during everything, his very devout sister-in-law called, and he insisted I stay quiet because of the nature of the situation, which was clearly wrong in our faith. I miss his company sometimes, but the feeling of being cut off and isolated was so intense it scared me. I worry I may never get married due to my circumstances, while he could easily have an arranged marriage and start a new family. I feel so much resentment about that. I would love to have a family someday, but I've been told it might not be possible for me, and there's also the challenge of marriage itself. How do I grieve and accept that I might not have children of my own? I have no family, and I'm not highly educated, but I am open to learning more from the Quran and Sunnah. I keep thinking about how innocent children are.