White spot on lip

To begin, I have been exposed to someone with oral herpes a while back.  I have now noticed a white spot (small bump when felt with my tounge)  on my lower lip centered.  occured once mid last year and another this month.  It is ther size of a very tiny pimple, but not as bumpy.  at times it looks and feels (with tounge) like a tiny blister but ranges in size through the day becoming flat sometimes. its never changes color other than white and what sometimes looks like a dark spec in the middle, and it has never "popped". it last about 2-3 weeks.  never painful or itchy.  not very noticible unless i point it out. After reading about herpes i feel that tingly feeling on my lips  every once in a while throughout the day but i dont know if its my mind being paranoid. I went to the doctor last time and she said it did not look like herpes and it cannot be tested unless it was an open sore.  I just went again for this occurence and again the doc said it did not look like "typical" herpes but decided to do a blood test and swab.  so now i;m waiting till tuesday for results.

Any ideas or advice on what it can be, or what else i can do to figure this out? thanks.

[gracefromHHP]

I'm inclined to go with the first provider who said it didn't look like herpes. It doesn't sound like herpes either.  If your blood test is hsv1+ that still doesn' t mean this is due to herpes, it just means you have hsv1 which the majority of adults do have but most don't get obvious cold sores to know it.

grace