Reflux (2 week old)

Leah • Pregnant with #2 have a 6yr old son from previous relationship. Work full time at the moment as a activities coordinator
I think my son has reflux. He is very unsettled after feeds even after winding (he brings his wind up really well) gets hiccups most of the time and is very sickly. Seeing my midwife tomorrow but wondering if anyone else has been though this. My first was not like this so not sure really on what to do. Currently we are sitting him up more for 15-25minutes after a feed, stopping and winding every few minutes when feeding but still the moment we lay him down he is sick (large amount) 
He is combined fed (expressed breast milk) and it does not matter if it's breast milk or formula he is the same with both 
Thank you in advance for any help