moody 18 year old daughter.

Is it normal for 18 year olds to act like teenagers still, even though they’re adults? My daughter is moody and emotional all the time, just like when she was 14-15. She’s in college and her behavior is tiring me. I’ve done my best to help her and encourage her to act a little more grown up but nothing helps. Did your kids still act like children at 18? Should I send her to therapy or something. She’s not spoiled or anything, she does chores around the house. She doesn’t have a job because she’s a full time student but she acts like an actual 14 year old. This mom thing can get hard at times