Is this my child?

My wife and I had our daughter when I was 23 years old. She's 4 now. She was born healthy and has been a great kid her whole life. Lately she's been super clingy. When I wake her up to take her to preschool she just holds on so tight and she doesn't want to let go. I can't just pull her off of me, so she just stays on and cries. I've tried talking to her, but that just makes her cry harder. It's gotten to the point where I don't even know what to do. Is this my child?