What to do if deregistered in final year?

I am final year student from already placed. I am in a course with GP rajasekhar. The prof takes attendance randomly and till now he has taken attendance on 5 random days.He had set a cut-off of 2 days. I have attended 1 from the days attendance was taken and prof sent me a mail saying I am eligible for deregistration. I am very stressed regarding the matter. Need urgent advice?