I think you have just entered "Phase 3" of the PE waiting period:
Phase 1 = Exhaustion (usually the evening / day / week afterwards. Just absolutely numb after the brain dump)
Phase 2 = Excitement (thank god it's over, I can get back to my life, I can't wait to be a PE)
Phase 3 = Doubt (Shows up after about 3-4 weeks, 'Did I answer question 3 right?', 'I don't think I understood what they wanted for #22")
Phase 4 = Anger (At about the 7-8 week range, "Why the F#^@ does it take so long to grade these tests?!?", "How hard is it to grade those stupid scan-tron papers?!?!")
Phase 5 = Results (10-12 weeks - or +/-30weeks for Cali, Your feelings will be 50/50, nuff said)
You are quite normal. I remember hitting the doubt phase about this time last year too...