Hi Ruth,
Just thought I'd add in a bit to what Alison has already written for you. My DS similar to yours suffered from reflux, was on medication etc and did not start enjoying food/solids immediately. But as Alison has pointed out its only about getting used to and experiencing solids at present and there is nothing to be concerned about.
My DS has grown to like his food and enjoys his solids now, so don't worry and enjoy his tasting solids, the more you relax the more fun your little one and you will have at mealtimes.
DS also goes son a hunger strike at times when he is teething, its quite common, and nothing to worry about as soon as the teething pain is gone the LO will go back to drinking milk as usual.
Hang in there!
Mukta