Your dream about blowing small gravel out of your nose can indicate that you're attempting not to let more practical beliefs and thoughts affect your direction in life or even your spirituality.
Gravel is an earth element, a ground cover. Often represents grounding and practicality while your nose is (what do you see at the end of your nose?) often where you are headed, your intuition (sniffing things out), inhaling/breathing (life, spirituality) and blowing your nose (expelling) is an attempt to expel something.
