Engorgement

I'm one week post partum & have been exclusively breastfeeding my son. My milk started coming in the 3rd - 4th day & im producing a lot & breasts are leaking everywhere. Today I noticed some lumpy bumps in my breasts that went down as he was eating . It's been about an hour since I fed him and I noticed they are engorged and lumpy again ! Is it dangerous to leave my breasts this way until he wakes up to eat again? (About another hour) or should I start using my pump ? TIA ! :)