I know that I’ve posted about his issue before, but my son is now 5 months old and still will not lift his head during tummy time and he doesn’t seem interested in rolling over either. My doctor doesn’t seem concered but I am because I feel like he is behind with his development. I have a couple of friends with babies that have started sitting up unassisted at this age. My son will pull himself up to a sitting position as long as your holding his hands but that’s it. I don’t know what I can do to help him succeed... 😩