This is something many of us have had experience with. If your doctor doesn't believe that it's part of Lyme disease symptoms, we now have a way to back it up - take this article to the Doc:
Hyperosmia (heighten sense of smell) in Lyme Disease.
Abstract:
"Neurological involvement in Lyme disease has been reported to include meningitis, cranial neuropathy and radiculoneuritis. While it is known that in some cases of asceptic meningitis patients may develop hyperosmia, the association between hyperosmia and Lyme disease has not previously been studied."
Conclusion:
"This first systematic controlled study showed that Lyme disease is associated with hyperosmia."
www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X2014000800596&lng=en&nrm=iso&tlng=en