Help!! Need advice reassurance

My LO is 6 weeks old his drs said he’s got colic I’ve tried everything to get him to sleep at night so I can sleep and nothing seems to stick I’ve even tried taking him to the chiropractor bc so many people have said it helps this first month has been rough he literally won’t sleep anywhere but in my arms. He did good for 4 days straight and I completely stuck to the same routine for him but now he’s back to not napping or sleeping anywhere but on me. Any advice with dealing with colic or relieving his gas pain at night would be helpful gas drops and gripe water don’t work. Or just give me reassurance as to when this gets better! Also I can’t nap when he naps bc his 4 yr old brother doesn’t nap and no I don’t have family that can help. -struggling mommy