Thank your for your query at DoctorSpring.com.
It must be quite distressing to witness your baby regurgitating multiple times in a day. Based on the provided description, which were indeed very useful, it appears that your child has PATHOLOGICAL REGURGITATION.
We routinely advise parents to burp their babies after feeding them. This practice helps remove the air that the infant accidentally swallows while trying to gulp down the milk.
In the case of your child, the fact that your baby is gaining weight adequately and growing well is definitely reassuring. Yet, a baby regurgitation feeds 20-30 times a day sounds abnormal. The fact that your baby has had an episode of 'aspiration pneumonia' is definitely worrisome (if that was the actual diagnosis). So whenever GER (gastro-esophageal reflux disease) leads to aspiration, it is known as GERD ( Gastro-esophageal Reflux Disease) and has to be evaluated and treated.
Firstly, I would request you to burp your baby routinely after every feed; for at least 10 minutes each time. If the problem persists, request your paediatrician for GER Technitium scan or equivalent test available near you. It is necessary to evaluate any child who is having such prominent regurgitation.
I hope that I have addressed your queries.
Saptharishi L G