11 week old refuses to sleep

Sh

He used to take 2 long naps during the day and sleep through the night with only one feeding. Now in the past couple of days he won’t sleep until 3 am and then he’ll wake up every hour or so. He won’t nap for longer than 30 minutes either. He was really colicky the day this started.

I’m losing my mind here. I haven’t slept for longer than 3 hours a day for the past few days. How can I fix this?