Awhh honey I feel your pain I have a 3 week old no reflux diagnosed but definite wind issues and general discomfort.
I really wouldn't expect too much more than your getting at the minute as they are so tiny. I'd just go with what works for now, it's too young really for bad habits to form.
I was paranoid with DS1 about bad habits but the first 12 weeks really are more about getting through the rough but, currently I'm sat with DS2 asleep on my knee, last night fell asleep with him in my arms then on my chest....all no no's but meant I had a sleep x