Genuinely concerned about my child

My daughter is 2 years old and for the past week or 2 she’s been putting her blanket in her diaper I guess so it can be on her vagina, she also does this to her butt. I take the blanket away and she cries and says no. I know children don’t know about masturbation, but she literally will pull her pull up down some to put the blanket in there. Does any of your children do this or something similar? I’m worried