Lyme disease presents many types of rashes from classic bullseye to homogenous with no ring structure. Compare yours with those on site below.

Lyme rashes can last several weeks so take photos for the record. Canadian docs almost hopeless in diagnosing Lyme disease unless a bullseye rash is present and estimated it shows up in only 30% of the cases.

https://www.cdc.gov/lyme/signs_symptoms/rashes.html

Do an image search on Lyme disease rash on google and tonnes of pics will appear.