He has a sensitivity to dairy for sure (not necessarily a protein intolerance, but colicy if I eat it). My milk seems to have leveled out for the most part. He now prefers the faster letdown but will just pull off if it's too fast. He does gulp a lot but the LC yesterday said he has a high pallet in his mouth, so more space to hold milk, and that is likely why he sometimes chokes or pulls off. She doesn't think he is gulping a lot of air now.
He still squirms and seems uncomfortable in the mornings (today was bad) so I bought the biogaia, and also booked a chiropractor appt as I've heard that can help.