Could be the age (translation: please tell me its the age and it'll stop soon)

For the past week or two I put Lucas down at 7pm, 40-45min later he wakes & has to be boobed back to sleep, often wakes again next cycle to be boobed again, then sometimes again 90 min later. He wakes at 4am when I bring him into bed, and he's on an off the boob (mostly asleep) until we get up.