I agree that it sounds like a hemorrhoid.
I have hemorrhoids...my colonoscopy last January confirmed it (something like "insignificant internal hemorrhoids" in the report). I get the same thing at times--a little bit of bright red blood on the TP or a drop in the bowl after a BM. Sometimes there is a little pain, sometimes not. Usually it happens after a hard/large stool or if I strain. Straining or sitting at the toilet too long will aggravate hemorrhoids.
If this is "new" for you, it is worth mentioning to your doctor. A phone call is probably enough for now.
July 2007 Drug-Induced Liver Injury
January 2008 Crohn's Ileitis
Enteral Nutrition, SCD, Omega-3 (Fish and Flax Oil), Folic Acid, Probiotics, Vitamin E, Psyllium