Think my baby has colic😭

Kayley • 24 years old, I have a little boy who’s 4 and I’m TTC my second baby!! 👶🏻
I am so stressed....
My son just cries all the time.
I have tried feeding him more, i check his bum (its dry), give him a dummy and nothing seems to work, i am cuddling him and he is just crying. I need advice ladies, i am not getting a break ever, my head is constantly sore and i am exhausted😭😳