Hi there and welcome to BW
Sorry to hear you are having a tricky time. Can you post your day in EAS format like this:
WU and E: 7am
S: 8.30-10am
E:10 am erc
This will help us to see if his pattern is broadly appropriate for your LOs age. We may then have some practical suggestions.
In the meantime, with shh pat, you go to the bedroom to do the wind down before sleep time and then if your LO needs it you pat him and shh while he's in your arms to begin with, the lay him in the cot and continue to shh and pat until he sleep. To begin with he may cry loudly, remember that crying is his only way of communicating with you. It may be, I'm not ready to go to sleep (perhaps because he's not quite tired enough) or it may be because you're starting a new routine and he's protesting the change. The important thing is that you remain with him so he's no crying alone (which is stressful for the baby and we believe, can lead to breaking the bond of trust between baby and parent).
It sounds strange, but it is helpful to remember your role as parent isn't necessarily to stop him from crying. If you think of it as if he were another adult, expressing his upset and telling you all about it, you wouldn't necessarily get him to stop, but you would listen and reassure and be there for them. The same is true for babies. Acknowledge their feelings and be there for them, and try not to be too worried if they are crying.
I personally didn't continue to shh pay for hours, I could tell fairly quickly whether my Dd was going to settle or not for sleep, so probably would shh pay for 15/20 mins and if this didn't work would get her out of bed for a short while before trying again
If you can post the EAS for your day there may be something that will help I that. Also, what methods have you been using before now to help your LO to sleep?
Here to help, xxx