This sounds like an initial orolabial Herpes virus outbreak. Meaning, this is your first time encountering the virus, so your body exhibited a full-body immune response, thus the swollen lymph nodes, fever, and muscle pain.
I'm not sure if this is typical for a cold-sore outbreak, but I'm sure grace, the moderator of this forum, will know.
cold sores are hsv1 orally the vast majority of the time. Treating it 7 days after it appeared with acyclovir was actually a waste of money - it was already almost all healed. If your provider didn't give you refills on your acyclovir for future cold sores, give the clinic a call and ask for a prescription to have on hand. in the future, anytime you feel a cold sore about to start, that's the time to start the cold sore doses of acyclovir. 800mg 3x/day for 2 days is the easiest way to treat cold sores with acyclovir. If you don't have insurance, you can still take advantage of the walmart and type stores $4 prescriptions for acyclovir. just get it for the 200mg dose and take 4 pills at a time.
for more info on hsv1 orally, see the herpes info at www.ashastd.org. there is a section specifically about oral herpes there.
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