i've created a spell. i may add or modify it at some point. feel free to do it yourself. it's best done on the second day of a full moon. i don't know why this is, but thats what came to mind with the spell.
light a candle, preferable a large one with multiple wics. the more heat the better. a fireplace works too, or in fact anything that uses a flame.
Say in a loud and clear voice "I call upon the element of fire" or invoke the powers of a deity associated with fire and/or protection. remember to do so respectfully and with no ill intent(or ill intent depending upon the deity). do this as you light the fire or simply think it with an already lit fire.
Allow th to burn for a bit and visualize the fire extending to surround you in a web or sphere, whichever is more visually impactful and 'sticks in your mind' so to speak.
Say in a clear voice, clearly pronouncing the words(DO NOT ******** SLUR THE WORDS OR IT WILL NOT WORK!):
"Flames without and flames within
Brightest fire long and thin
Protect from harm my body and mind
From evil beings and humankind
Harm from without and harm from within
Protect me oh flames so long and thin."
repeat as you feel necessary. this is a decently lasting spell(one lunar cycle if done properly). its more of a no pain spell than a protection spell. it will not protect you from your own stupidity, however. i have hit my head quite hard in a way that likely should have at least made my ears ring, but sustained no damage and indeed no pain at all besides the initial shock of impact.