Hello sir, I am 24 year's old, In July 2018  I visited a lab to identify my blood group.He had taken blood from my left hands middle finger and after that I realised that ,it was the same serienge which he has already used to take blood samples of atleast 15 to 20 mens before also and he had also accepted that.So sir it has been already over 3.5 years and I have not done any test also after that.So sir what should I do now because sometimes when I think about this it scares me.