Hi Rowellen,
My Girl was born on the same day as your DS and we have had sooo many sleep issues in the last eleven months! Firstly I have found teething makes a big difference here, but you said it has been happening for 3 weeks, has he been unsettled ie red cheeks etc the whole time? We still feed DD to sleep most nights, other nights we rock her in her pram and then transfer her when she is in a deeper sleep, have you tried that? It is a nice excuse to go for a night time walk
We dont do CC either, and it is impossible to pat her bum to sleep as like you said they wriggle and sit up and carry on these days. Is your DS showing tired signs when you start rocking him? I believe they drop a nap when they are ready, so if he is showing tired signs then I would think he still needs his 2 naps but Im no expert either. Sorry if this is all muddled! With all the sleep problems we have had here, eventually I just gave up trying to change patterns etc and she started sleeping better about 2 months ago but I think seriously it was just when she was ready to do it, stubborn little thing she is. Hopefully someone else will have some better advice for you