Hello mom! My daughter will be six months old soon. It's hard to get h…

Hello mom! My daughter will be six months old soon. It's hard to get her to sleep at night. She sucks on my breast and falls asleep, then wakes up and starts turning her head, tossing and turning, raising her legs and throwing them out. Like she can't relax. I give her the breast, pat her but she doesn't fall asleep, she keeps tossing and turning. Then I have to pick her up and rock her, only then does she calm down and go back to sleep. Is this normal?