Congested or constipated 2 week old!!

Nita

My son is two weeks old tomorrow and lately he's been crying hysterically. I changed his formula because the Similac was a little too heavy on his stomach so I switch to sensitive. I have been also noticing that he's congested so with that I bought a humidifier. He will be OK for a minute and then start crying really bad again. Any suggestions for any congestion medicine for newborns?I can literally hear it when he breathes or has the pacifier in his mouth.  He never cried so much until last night 😳. If this doesn't work I'm going to just say his colic...😩