Sending you hugs lovely!! The only thing I can think of is probably going to be a tad uncomfy more so for you than your little one. It might take you deciding where you as his mummy want him to sleep during the day and simply retraining him. He's learnt that the swing is simply heaven to sleep in because of all that lovely motion and so now he just needs to learn that it's ok to sleep without motion. It could take from a couple of days to a week or so and a whole lot of tears but I think if you persist he will be sleeping where you want him before he hits the weight max of his swing. Just be patient, consistent and persistant.

These are just my thoughts lovely and I am aware that it's not everyone's cup of tea to go down this path so you need to do what works for both of you but I hope it's partially helpful - hth!! Thinking of you!