If your baby is crying, then go get him. Babies, especially under a year, are developing trust. If he doesn't have his cries responded to, how can he develop trust that his needs will be met. He is too young to be manipulating you in any way. He only knows what he needs. It may be that he wants to be with mom, or it may be that he is hungry right away. Physical needs and emotional needs deserve equal attention. I also believe that my child's needs should be given equal respect as my own needs.
As you can probably tell, I did not follow the Ferber method with my children. In fact, my three girls have all slept with me from birth until about age 3. I don't even see any reason that people, especially babies, should learn to sleep alone. I have nursed all 3 of my girls. We nursed on and off throughout the night. After a short time, I was able to sleep through nursing. With my child right there in bed with me, I was able to get good rest. We all do well with this arrangment.
If you are feeling stressed, you also deserve to have stress relief. Maybe hire a mother's helper as I did to get up with the girls in the morning. She is 14 and comes 8:30-12:30 during the week. I pay her $100/wk. I can sleep in, exercise, do some housework, or whatever I need to do in the morning. It definitely helps me start out my day with a positive attitude. Good luck!