Moms help!!

My son was always such a great sleeper 10-12 hours a night until he hit 9 months old,he started waking up 2-4 times a night he is now 11 months and he still waking few times a night.

In 2 weeks he has only slept a full night 3 times.

Does it get better?

Edit:I know sleep regression, didn't know it could last months!!

He eats 8oz bottle of formula before going to sleep,he can't have anything else or he is up crying due to gerd