Sleep deprived!!!! Help!!!!!

So my baby boy is 3 weeks old today and we can’t seem to get him into any sort of pattern. I know he won’t get a sleeping pattern for months as I breastfeed and he is only this young, but from about 3am he will feed for a bit and either sleep for 20 minutes or stay awake then sort of sleep through feeding.. and he will repeat until 9am!!! He will even scream at times for no reason - well I can’t seem to find any reason apart from a little trapped wind but even when his wind is gone he seems to cry. I change his nappy, feed him, check his temp, cuddle him, give him a soother!.. Last night I was so tired he fell asleep in my bed, but he was close to me, I woke up and put him in his cot and he woke up. He’s a very heavy sleeper though, there’s been days he’s sleeping and he’s been passed about and moved around from his bouncer to the cot etc.. I’m a ftm and slightly clueless! Feel useless at the moment 😩😒