They do often have an unsettled week at about his age. Do you co sleep? It may be worth a try. Even just for a few hours a night (Mine usually started out in their beds, then came into our bed after first wake up).

Have you tried patting/rubbing to sleep rather than the dummy? I found with mine that if I put them in the cot on their with one hand firmly on their shoulder, the other firmly patting their bottom/leg, they'd settle alot easier. Just don't suddenly stop get lighter first.

Showers can work better than baths too. Mine would crash for hours after a shower. They still love them!