Ate some bread that i later discovered had a few mouse droppings on it. worried about hantavirus. should i be worried? and is there a test for it?

Hantavirus: People may be able to get the virus if they touch something that has been contaminated with rodent urine, droppings, or saliva, and then touch their nose or mouth. The major route may be by breathing in similar materials that have become airborne. The incubation period is not known. Early symptoms include fatigue, fever and muscle aches, especially in the large muscle groups—thighs, hips, back, and sometimes shoulders. These symptoms are universal.

Low risk: First - from 1993 when Hantavirus surveillance began in the US until JAN 2017 (latest data I could find) there were 3 Hantavirus cases reported to the CDC from Wisconsin. Can be diagnosed with antibodies.