Maybe you could try a different bottle or nipple flow. My baby always spit up with the Doctor Browns bottles, I tried the Avent natural bottle and she rarely spits up now.
How old is your LO? My LO is 2 months old and started spitting up a few weeks ago, along with having noisy breathing what we thought was nasal congestion. Took him to the pediatrician this week for his 2 month appt and the doctor didn't see any nasal congestion and from our discription said it sounded like reflux and gave us a rx for zantac, we just started it last night and saw a small improvement already.
Re: spitting up question