Normally acting out is a child’s way of expressing frustration or some other issue. They are super young and don’t have a big vocabulary, nor do they have the experience to deal with these “big emotions”. So, I can assure you that you are not alone in this.
However, this is a bit outside of my realm of expertise. My friend @hislittleflower-throughconcrete works in the field of childcare and might have an answer! babycenter.com is also a great resource for parents.