J.J.
Sounds like you are very tired! Do whatever you can do to take care of yourself while your baby is going through this stage. Can you go to bed earlier? Start out the night with baby in bed with you? Are you breastfeeding? If so that can help. It is normal for babies to wake more at 7 to 9 months of age because of changes in their development. He may have what's known as "stranger anxiety" or "separation anxiety" which just means that he is more sensitive and more aware than when he was younger. He may be about to learn a new skill, like crawling, for example, and have more light sleep states and not know how to get back into a deep sleep. Babies brains are growing fast at this age and they are learning during light sleep states. He also may need a later nap and be overtired. Answer his cries right away before he he is fully awake and ask your mother to do the same.Try spending more time with him in the evening-he may miss you when you are at work and need more attention from you. Maybe you and your mom can carry him in a sling or cloth carrier during the day. He sounds like a normal 8 month old to me and I am an RN who has taken care of babies for many years.