At my absolute tipping point

My son is 6 months and one week. He does 3 naps a day and sleeps from any time between 8 - 10pm

He is driving me absolutely crazy, every sleep time is A 1-2 hour fight, he’s been like this since he was born. Except few weeks at a time exception, I try everything? Right now he’s teething so I am using calpol every damn day. My back is killing is killing me from rocking him, he falls sleepy in my arms I put him in his bed and he starts moving around and making playing noises. No matter how tired he is. I am so fed up. He won’t sleep with his dad. So it’s always me or pushing in the pram for ages until he finally naps.

I am literally about to lose my mind, what do I do???