Pacifier help

Toni
Little one is 6 weeks & cannot suck on the pacifier he instantly kicks it out with his tongue even though he tries really hard to suck on it. I literally have bought every brand. He's only breastfed but when I do pump the only bottle  I found that he likes is breastflow! He need something to suck on to go to sleep so I give him
The boob but he gets over full and just spits up all over himself. Someone said he might have a high palate. He goes to the doctor in 2 more weeks I'll ask her to check then. Any suggestions until then.