Baby wearing in a sling or carrier on your body, and anything that allows your baby to be close to your breast, such as co-sleeping, should help increase feeds as well as milk production. There is nothing odd about an infant feeding a few times an hour. In traditional societies, that have little to no outside 'expert' influence, their babies nurse 2-4 times an hour. The more often the breast is emptied, the higher the fat content of the milk. That is because foremilk takes time to accumulate. Therefore when milk is consumed often, the Hindmilk is readily available.
How does baby's latch feel? Is it comfortable? Do you note swallowing, gulping? There is a condition called tongue tie in which the tongue is 'tied' by a piece of skin and prevents proper latch. Baby needs to have a mouthful of nipple and compress beyond the nipple, the areole, in order to transfer milk. Improper transfer could prohibit weight gain. Did baby gain well for the first couple of months?