My 7 month old has always been a challenging sleeper. So much so he currently naps in his bouncer. Sleeps at night next to me in his co sleeping cot and breastfeeds through the night. I'm desperately trying to get him into his cot at least for his naps. I sit with him until he falls asleep then he'll nap for maximum 20 minutes before he's crying. I'll try and resettle him but he'll scream until I pick him up. Then he's cranky and tired until the next nap where again he'll only sleep for no longer than 20 mins. It's driving me insane. Any suggestions would be really appreciated.