My DS has always spit up a lot, but since he doesn't fuss or seem to have pain and is gaining weight just fine I wasn't worried. He's 5.5 months now, has been exclusively breastfed (both breast and pumped in a bottle), and it seems like he's spitting up more. Often times it makes a big puddle on his shirt or blanket (3 inches / 9 mm in diameter - a couple of tablespoons it seems). And he does it 4-5 times within an hour of eating (some bigger and some smaller) with both breast or bottle. It's thick and chunky and sometimes like mucus. He still never fusses, but everyone always comments that they've never seen a baby spit up that much.
Could it be reflux or an allergy to something I've eaten? Or does this sound like a normal amount of spit up?