I'm so sorry for you. I lost my younger brother a few years back and I used to see him in my dreams. One of my most vivid dreams I used to be wandering g through an old deserted farm house and I could hear him calling me and crying. I was always searching for him, like a phantom limb.
It was like my brain was still trying to process that he was gone.
When I woke up I would feel his loss anew because my dream was so real and so vivid. I could hear the inflection in his voice, his laugh, the shape of his hands and how he felt when I hugged him tight. I could hear him crying that he wanted to be with us and it haunted me completely.
I would feel bereft all over again and the grief was awful. I too wondered if he was searching for me or if he was lost somewhere, and that absolutely broke me.
But ultimately it was my brain processing the loss and losing someone you love so much is the most traumatic loss. It is a wound to heal from and sometimes it still opens and weeps years later.
I called a psychic in Canada once (she didn't charge me) because I wanted so badly to know where he was, I wanted so badly to know that he was ok. She didn't even know who I was, didn't know my name or where I came from. All she said was "you've been through a terrible loss. Your brother wants you to know he's ok".
I don't know if it was true, I don't care if she was a fake. All I know is that after that point I stopped searching for answers to the impossible.
I still dream about my baby brother. But I can only be glad that my dreams of him aren't those of him in pain anymore. I hear him laugh, I see him smile and it's ok.
All we can do with grief is relay our own experiences of it, in the hope that the knowledge that someone is going,or has gone through the same thing, brings some measure of peace to another.
I know how difficult and how horrendous your pain is and I truly wish you some peace 💐