Herpes New Infection? Lesion on my lip

I performed oral on an escort about a week ago.  Also had protected vaginal sex.  About 5 days afterwards, I got what I believe to be a cold sore on my lip.  I have had cold sores in the past, on occassion.  This is a little different.  Instead of it being a big cluster, it was a series of small vesicles, about 1/16th of an inch in diameter.  There were maybe two on my lip and then about 4 or 5 in kind of a line that ran down about 1 inch from the edge of my mouth.  Probably was a cold sore, just seemed unusual.  Also, since the encounter, I had kind of a sore throat.  Not very bad, but enough to talk a little hoarse.  I also had tightness in my chest, like a chest cold, which has seemed to gone away now a week later.  My neck feels swollen, a little, but I don't think I have swollen lymph nodes.  Just feels tight and "thick."  I do have some small, white patches (maybe 1/8" or so) in the back of my throat.  Otherwise, I am a healthy, mid-40s male.  I don't have any other symptoms.  Now, my question is this...I have been tested for herpes before and had a positive result (of course, since I have had cold sores all of my life).  I never got the "typed" test, so I don't know if it is I or II.  If the sore on my lip was Herpes 1, could it have been caused by a re-infection due to the unprotected oral sex I performed?  I read somewhere that if you had Herpes 1, you were pretty resistent to Herpes 2.  Is it possible it is a new Herpes 2 infection on my lip?  Is there any other STD I could have picked up from this??  I plan on taking 2g of zithromax just incase but I am just wanting to cover all the bases.