My baby has regressed! He was sleeping all night....

He is going through a growth spurt. Feed him when he wakes up hungry then put him back to bed.

I do but then what can I do to to help him sleep more

He'll sleep again when he finishes the growth spurt.

how long does a growth spurt normally last ( gosh this makes me sound desperate for sleep lol)

Usually around a week, but it can go longer.

thanks

I'd say more like 2 to 3 weeks, but every baby is different. You actually really just got lucky that he was already sleeping through the night before 7 months old.

My daughter was sleeping through the night at 6 months old, and she does occasionally wake up in the middle of the night but I don't bother her. She goes back to sleep on her own after about 10 minutes.

How does he act when he wakes up? Does he wake up crying like he's in pain, acting hungry, just laying there cooing? If he's crying like something hurts, he could have an ear infection, or be teething - frequent night waking has always been the first sign of an ear infection for my kiddos, so call the doctor. If he's acting hungry, feed him. If he's happy, leave him be unless he starts screaming.

You don't really need to fix anything. He's not broken. :) You have been exceedingly fortunate. Baby sleep patterns don't settle really until age 3 or 4. So a sleep 5-8 hours at a time tonight and tomorrow, doesn't mean it will continue the day after that. Growth spurts, teething, and reaching milestones (learning new things) can make for more wakeful babies. Also the time of year and just growing up may mean that putting him to bed too early means he'll wake up earlier.

My baby is breastfed and wakes every 3-4 hours for a diaper change and a feed. It's quite normal. Not even adults sleep without waking for some reason even if they don't remember doing so.