I'm about to lose my mind ? The baby wakes up every single night for t…

I'm about to lose my mind ? The baby wakes up every single night for two months and cries, I have to calm him down and put him back to sleep, sometimes I just feed him and he falls asleep, but other times he stays awake for 1-2 hours ???? It wasn't like this before and the sleep was peaceful. In daytime naps she also wakes up and starts crying ? I don't know what to do, has anyone had this experience? What should I do? I follow the sleep schedule.