My daughter is on one today. She is wanting to cry about everything. I put her down she cries I pick…

My daughter is on one today. She is wanting to cry about everything. I put her down she cries I pick her up she cries. Idk what is wrong. She is also getting into the hitting, scratching and throwing stage. I tell her no and pop her on the butt not hard just enough to let her know she is in trouble. She will cry for a few seconds then go back to doing just what i told her not to and look straight at me while she is doing it. I am looking into putting her in daycare but with her acting like this idk how well that we'll go. I am at a los as what to do.