My baby wont stop crying

Hello. My 1 month baby has been crying non-stop for 3 days. Starting from the third week since birth, he has been sleeping for like only 14-16 hours per day. We as parents have tried every thing possible to calm him down including breastfeeding, normal feeding, picking him up, taking him out for a walk, massage … but he definitely wont stop. No sign of fever or sickness thou. Any1 experienced the same situation? What else we can do? Please help.