Sleep regression ?

Can the 4 month sleep repression start as early as 13 weeks?

My LO is no longer sleeping 5-6 hour stretches...he’s reverted back to waking every 3 hours every night (like he did when he was a newborn) and wanting to eat during this time as well. I’m effing exhausted and wake up with a headache every time he’s up ☹️ lord help me