Colic Vs. silent reflux

How can I tell the difference if my baby has colic or silent reflux or could it be both? My LO arches his back, super gassy, grunts, looks in pain, has wet burps, sometimes projectile vomiting and at night, he will scream/cry and super fussy for like 2 hours. He also will latch on, pull away, scream, latch on, pull away on repeat.

I feel so bad for him. I have talked to the doctor and she thinks it’s colic since it’s mostly at night.

I am breastfeeding and formula feeding usually at night. LO is on gentlease.

Thanks for reading. Momma is feeling helpless.