Welcome to LymeNet.
So sorry your daughter has this problem, but I feel confident you'll get the help she needs.Won't repeat the great info Orion gave, but will add a few comments.
Print "Diag Hints & Treatment Guidelines..." www.ilads.org/burrascano_1102.html
It's 32 pages of excellent info written by one of the best LLMDs in the country.
Read the last section "Rationale for Treating Tick Bites", especially the last paragraph.
"...It follows that the risk benefit ratio favors tick bite prophylaxis."
page 16: Antibiotic Choices
Doxycycline: Adults - 100 mg qid with food
which totals 400 mg per day.
Typical dose is 200 mg/day.
pages 17-18: Treatment Categories
Early Localized - single erythema migrans (bull's eye rash) with no constitutional symptoms.
Adults: oral therapy for 6 weeks
Some LLMDs are now treating for 8 weeks or longer just to be sure they've eliminated the bacteria.
Go to www.ilads.org
Print Home Page to show reliability of this wonderful organization.
On the left, click "Basic Info" & print both pages. Important facts that everyone should read.
#10 begins "There has never...been one study that proves even in the simplest way that 30 days of antibiotic treatment cures Lyme disease..."
Take copies of these 3 items where ever you go to see a dr about Lyme (Home Page for ILADS, Basic Info, & Guidelines).
Could you call your family dr about the situation? Some see patients on the weekend when necessary.
Do you have a Doctor's Care or other walk-in clinic in your area?
I've heard that some people have found an understanding dr at some of these clinics who will prescribe for Lyme. If your ER is like ours, the walk-in clinic would be faster & less expensive, but they MAY NOT want to follow Dr B's Guidelines.
ER would be another option, but they MAY NOT want to follow the Guidelines either.
Do not waste time or money with a Lyme test this early.
It takes the body 4 to 6 weeks to produce enough antibodies for a positive result.
In "Basic Info" from ILADS, read # 5-8 about testing & the problems with test results.
The Lyme Disease Foundation brochure says:
"A test may support the diagnosis of LD, but cannot be used solely to make the diagnostic decision. No test can definitively 'rule-out' Lyme disease."
"Lyme disease is a 'clinical' diagnosis, based on signs/symptoms, with consideration given to other factors..."
The bull's eye rash is diagnostic for Lyme disease & should be treated adequately.
Be sure to take pictures & write down date of bite & day bull's eye rash appeared.
DO NOT wait for other symptoms to appear.
In my case, I removed a tiny tick, had the rash but NO symptoms appeared until 5-10 years later.
No diagnosis for another 5 yrs because I didn't associate the symptoms with the tick bite many years before. By then, my case of LD was much more difficult to deal with.
Because of the seriousness of Lyme when it's allowed to spread throughout the body - my recommendation is to err on the side of caution. Treat now.