I called up when DS was 2 weeks & they advocated controlled crying
I am really surprised by this. Tresillian do not advocate controlled crying, maybe back in the day but not anymore. They do believe that babies cry as part of the settling process but in my experience always say to listen to your instincts and your baby and would never advocate leaving a distressed baby to cry itself to sleep, especially at 2 weeks!! I called often during DS's first few weeks because he was very unsettled and I was always told to do whatever worked (cuddles, sling, co-sleeping) and to try to get a baby this young to self settle was crazy!

The first thing I wanted to say is that this is very, very common in young babies. It's awful and draining and hard work but as Trish and Bek both said, with consistent resettling he will eventually understand that it's not time to be awake yet and will learn to resettle himself for longer sleeps.