Aww hun! I feel your pain! i have 9 nearly 10 months of broken sleep and it really begins to mess with you and your brain hey!

you must do what feels right for you! If he is not crying maybe leave him to see if he will go back to sleep himself? Some babies are just highly sensitve and some dont need much sleep both types are my ds.
Could he have a upset tummy from certain foods? Maybe he has something out of place? Have you thought of taking him to chiro? Thats my next step if Ds doesnt start sleeping better soon!
Do you put him down berfore he is tired? This was a tatic one of the girls suggested in my thread about not sleeping and Ds seems to have at least 4 hours now but after that he is up sometimes every hour?

Hope this helps a little! Best of luck! Just remeber to believe in your parenting!
xx