Thanks you two.
Aidan, that's probably from the weight I put in when writing/drawing. I consider myself adextrous, not capable of writing with either hand, because with the left it's too slanted to be legible, and with the right it's too hard and thick and messy. And physically painful. The only thing that carries over into my art is the weight of which I press.
I hope to have more drawings soon, my 2 Arts and Letters credits will likely be Studio Art 113 (Drawing; Colours and Designs) and maybe creative writing.