This is very personal for me to share this, but I also terminated a pregnancy 3 years ago. At the time I also tried not to think about it too much and moved on. Whether I've truly grieved or not I'm not sure at this point, and I've never dreamt about it. BUT, my cousin who is very psychic gave me a reading where she told me that the same soul badly wants to be born to my husband and I and that he or she is waiting for another opportunity. It gives me some relief to think that this is the case. Also some curiosity to contemplate this wonderfully patient, persistent soul and what fate intends for us.
I don't know if this helps. But I do believe that we connect strongly with other souls and live many lifetimes together according to our karma. I don't think that your belief is selfish. If the feeling is strong in you, there is some truth to it.