Reflux issues

Sisi

My almost 5wk has such a bad reflux. Suckling helps but some times he tries to suppress it by drinking his bottle faster and he makes this horrible chocking, gargling sound... and after feeding time, he sounds like he is in pain... is there anything I can do to help? I am doing upright feeding, pace feeding, burping in between and some times I just hold him trying to make it go away... but nothing helps. HELP 😭