Sleep deprived 😫 help

My 4.5 month old still only sleeps in 1.5-2 hour stretches at night. He then wakes up, can’t get back to sleep and nurses (normally both sides) before going back to sleep.

I’m really starting to struggle as I haven’t had more than 3 hours of sleep at a time in over 4 months 😭

Is anyone else going through anything similar, or have any suggestions to help him sleep in longer stretches?

My pedeatrician recommended giving him baby oatmeal right before bed, to keep him full longer, but it hasn’t made a difference 😣