My baby is not sleeping properly from 2 days He sleeps for 15-20 minutes and wakes up and he’s fussy what is the reason?

A. hi your baby is 2 months old now see if has nose block which makes breathing difficulty and disturb sleep or having tummy fullness .put nasivion pediatric drops 1 drop in each nostril every 6-8 hourly,burp well, avoid bottle feeding and warm massage to belly and make cycling movements of both legs to relieve gas