Let baby cry non stop?

Research had shown that crying for less than 5 minutes helps to boost the lung capacity, however persistent crying for more than 5 minutes does not benefit the baby and instead exposed more harmful air bacteria to baby as they do not have nostrils hair to block off harmful/dirty bacteria. Hence, it would be recommended to slowly extend the time that help is given to the baby as he/she grows older. You can have a talk with your husband about it. As long as the baby is about a toddler age which means 1.5 years old then he/she is able to cry up to 45 minutes without causing any harm to the body. However, 7 weeks baby is far too young to cry for long hours.