My 2 month old baby has this "habit" of drinking bit by bit... Be it either formula or breast milk... Isit normal? And also is this "habit" to be worried about?

How long is the feeding interval? For newborn normally need to be fed every 3 hours and if feed less than this interval baby have not digested the milk yet and thus take in less milk. Try to find out the reasons baby cries instead of offering milk each time.