There is currently no reliable Lyme test. The most commonly used test has an accuracy and sensitivity of 50 %. Worthless. A tick bite + weird symptoms = very high change it's caused by a tickborne disease.
The CDC says, "When performed and interpreted in accordance with current guidelines, 2-tiered serologic analysis has a sensitivity of ≈70%–100% and a specificity >95% for disseminated Lyme disease." [https://wwwnc.cdc.gov/eid/syn/en/article/22/7/15-1694.htm]