The antibiotic you’re taking, metronidazole, has a number of GI side effects. It can cause stomach upset, and can turn your urine dark (web md)
I worked with food all my life, and had hep A,B, and C at different times. I never had to disclose this to my employer..your exposure was 3 to 4 months ago. Your not likely to turn yellow at this stage, if you do have hep b..