My daughter had an awful oversenstive gag reflex and this sounds very similar. We were on 7 month old+ puree when she was 15 months old - the stuff for 10 month olds would make her gag and sick even by then. She was sick on everything and we didn't stand a chance with BLW, despite our efforts. We just had to wait it out. She still takes really small mouthfuls and takes foreveeeeer to finish a meal at age 3.
Weaning DD was such a nightmare and I still dread mealtimes with her. Feeding DS (who eats EVERYTHING we have given him without issue) has been such a different enjoyable experience, and has only shown me just how bad DDs gag reflux was.
Stick with it hun, and if you need to stick to smooth foods so-be-it. I felt such pressure surrounded by all my friends who had these awesome BLW munching babies but I wish I hadn't let myself get so wound up by it, and just carried on with smooth purees and soups xxx