Babies generally from 1 months to 3 months cry in evening.... called as evening colic. They generally remain calm in morning hours. This problem stays for few days and goes by itself. Smelly gas is normal if baby is on exclusive breastfeeds. There can be some other reasons for cry like diaper rash, ear infection or urine infection. So You need to consult pediatrician once .

You have consult for giving medicine on Practo