I live in Middle TN and have been ill for the past 2 years when I got a tick bite! You can read through my blog if you want more information!
http://afflictedbylyme.blogspot.com/
you need to get on treatment ASAP do NOT wait for the results as they can take weeks.
Yes Lyme can start in a localized muscle or all over it varies so much but I wouldn't count out your location because Lyme is really at epidemic levels all over the country.
There is definitely Lyme in the south, and many doctors say it is terribly underreported because of a belief that it isn't there.
Yes, Lyme can start as a mucle ache. If you can get tested right away and you do have it, then you can start treatment and it will be fairly straightforward to cure. You will need at least a month of antibiotics, possibly more. The "standard" of 3 weeks of doxycycline has a failure rate of 10-15%, too high of a risk considering the damage Lyme can do.
If your regular lab test comes up negative, than try getting tested at IGeneX, a specialty lab in CA. They find more cases than other labs due to more advanced testing.