As for the losing of weight what is his birth weight and his current weight?

Yes its normal for the Tommy to make noise because your baby might be experiencing what is called Colic.

Babies with colic or infantile colic are healthy, well-fed babies who cry long,often inconsolable for no apparent reasons in the first three months of life.
It is often described by the rules of threes. Any healthy, well-fed infant who cries:

- More than 3 hours a day,

- More than 3 days a week,

- For more than 3 weeks.

However NOT EVERY CRYING IS COLIC!

Colic is common. It usually starts a few weeks after birth and often improves by age 3 months. By ages 4 to 5 months, the majority of babies with colic have improved.
Colic improves on its own, often by age 3 months. Unfortunately, there are no proven treatments that consistently help every baby.

Tips for soothing your baby.
To soothe your crying baby, you can try to:

- Hold your baby.

- Cuddling helps some babies. Others quiet when held closely and swaddled in a lightweight blanket. To give your arms a break, try a baby sling or other type of baby carrier. Don’t worry about spoiling your baby by holding him or her too much.

- Keep your baby in motion.

- Gently rock your baby in your arms or in an infant swing. Check with manufacturer’s guidelines to be sure the swing is appropriate for your baby’s age.

- Lay your baby tummy down on your knees and then sway your knees slowly.

- Take a walk with your baby, or buckle your baby in the car seat for a drive. Use a vibrating infant seat or vibrating crib.