Is it ok my 8 week old son has reflux and dr told me to put 1 table spoon for every 2 oz rice cereal?

at first he was on similac advance, then soy and now alimentum. he is also on rice cereal and ranitidine 0.5ml twice daily. He still spits up and i am so afraid to lay him down at nite afraid he is going to choke. i brought him a crib wedge but don't work. he sleeps in his bouncer chair and be looks very missable. I hate the fact that he sleeps that way. he gains weight very well and he is not in any pain ( that i know of)he has a primary dr but we only saw him 3 times from the time my son was born. it seems that i always have to see another doc each time . some one please help me i don't know what to do