Most common cause at this age is their increasing activity. Hence their feeding demand also increases. Try to give sufficient meals so they dnt feel hungry

There is no medicine for making baby sleep. You should have done that training from birth itself like making lights off at night. Giving babybath in early in the day so that baby relaxes. Massage should be gentle and not very vigorous. Feeding baby adequately every time.surround of baby should be quite, warmth,stress and noise Free environment. Your schedule should be flexible. Visit your doctor to see whether child has any gas related, feeding issues.