I believe Protection from Evil would prevent the insects summoned by Creeping Doom from touching you. Quoting from the SRD,
"Third, the spell prevents bodily contact by summoned or conjured creatures. This causes the natural weapon attacks of such creatures to fail and the creatures to recoil if such attacks require touching the warded creature. Good elementals and outsiders are immune to this effect."
Interestingly, Protection from Evil is an exclusionary protective spell. In other words, it hedges out everything *except* good elementals and good outsiders. In contrast, the other Protection spells provide inclusionary protection. For instance, Protection from Chaos,
"As protection from evil, except that the deflection and resistance bonuses apply to attacks from chaotic creatures, and chaotic summoned or conjured creatures cannot touch the subject."
It seems that Protection from Evil offers more comprehensive hedging than the other Protection spells.