Here are some examples.
#I want to fix my artstyle. Is there anything i can do?
exotic owl
ruby spoke
novel coyote
I personally don't see anything that you need to "fix" in your artstyle, but some of your examples here I personally would add more shadows to.
I would also like to add that you could play with dramatic lighting if you wanted to 
daring hinge
Often times when you get stuck with stylized content it really helps to go back to drawing realism and using photo references. then decide what features you want to stylize and which to keep closer to reality.
this will help as practice but also refresh your brain by drawing something different.
hope this helps, finding your own style is one of the hardest parts of art.