baby still not sleeping 😩

Kayley • 24 years old, I have a little boy who’s 4 and I’m TTC my second baby!! 👶🏻
My son is 4 months old now and still not sleeping through night, he's in a routine, bed by 8pm and then he wakes at 1am and 5am for feed, I am exhausted, why is he not sleeping😩 he's still so colicky too even though he's been on every medication possible. Please tell me my baby is not the only one not sleeping?