My son just turned 8 months old and is having terrible naps the past few days. His morning nap is great, sleeping 1 1/2 to 2 hours but his afternoon nap has been terrible! He fights going to sleep, today it took an hour, then he only sleeps for 30-40 minutes and wakes up screaming, still exhausted. I have no idea what to do or try. The past two days I have ended up with his sleeping in my arms for another hour or more, but the fight to get him back to sleep is terrible. He is currently crying in his crib after waking up after a 30 minute nap.

Any advice?