There's a thread on laryngomalacia thats just been started, do come and post on it
dd2 has laryngomalacia, she's 2.2 now but was diagnosed at 4 weeks, when she was very ill with bronchiolitis and in hospital - and had the conclusive test (flexible laryngoscopy) at 8 weeks. They wanted to see the extent of it, which in her case was moderate - no need for surgery, but more risk of hospitalization with upper respiratory tract infections like croup or RSV.
One thing you should know is that the stridor (noisy breathing) tends to get worse up until about 3 months, then it slowly gets better. And its known to be stressful for parents - even though most of the time it doesn't cause distress to the babies who have it, so if you find yourself worrying about the noises, remember you are not alone! You'll get used to them, we did, to the point where we'd forget and be surprised when GPs who didn't know her would do a double-take when we walked into their room with her
We always put her to sleep on her side (wedged, early on) as sleeping on their back is the worst position as the larynx 'flops' backwards. We raised the head of her cot on books, or put a pillow under the top end of the mattress. We bought a humidifier, which helped especially when she had colds or coughs.
Many babies grow out of it by 6-9 months, dd didn't but it got slowly better - till her huge tonsils and adenoids added to the narrow airway caused by her larynx and resulted in horrible sleep apnoea, which has been sorted out by taking her tonsils and adenoids out and (to quote the surgeon) 'while we're in there, we may as well do the larynx surgery because its still quite floppy' which meant cutting teeny bands of cartilage either side of her windpipe.
She's now doing absolutely great!
Feed-wise, we had no problems...though weaning took a while, because she couldn't cope with pureed foods at all: BLW with finger foods only worked beautifully though.