So sorry for your loss, its so difficult and painful i know. I lost my wonderful parents many years ago when I was a teenager.
When I was pregnant a couple of years ago I locked a disc in my back and was in a great deal of pain, which resulted on me being literally laid up on the sofa from about four months. I was terribly low, in awful pain and spent many hours crying for it to be over. Anyway, one night after a really awful day I managed to get to sleep on the sofa, I suddenly work and my dad just walked into the room, clear as day, and put his arms out for a hug. I said to him, don't dad, I can't bear it your not really here and I can't bear not being able to feel you. He said, I am absolutely here, im always around you but at the moment you really need me. I sat up and he hugged me. Now, I absolutely swear I felt every bone in his chest, he was totally solid. He just hugged me and said it would be ok. I asked where mum was, he said she can't come back she feels to guilty for leaving you but she loves you and wishes she could.
I felt that hug for so long afterwards, even now tbh. I never told my sister about it but she told me not long ago that she sees dad a lot but not mum as dad told her she can't visit because of the guilt.
I know people will think I did dream it but I know it didn't, I know he was there.
I hope that helps you, I've felt him around a lot, that was the only time he came back in 15 years. I truly believe they go onto a better, no pain place, and I truly believe that I will meet them again. The universe is bigger than our little world, that I am absolutely sure.