Hello doctor on 20 march 2025 a quack give me two injections one was dexamethasone and other was multivitamin but syringe was all ready used to other patients before use on me after that I took pep on 21 march 2025 with in 24 hours and taking for 28 days and than I had multiple test of duo from exposure last was done 54 days and tri dot rapid test at 150 days after 5 month come negative any chance to become positive after 6 month and having symptoms like white buring tongue