D in Physic

So my current semester just end and grades are out...I got a D on physic 1, is medical school still viable? I was taking ochem2, human genetic and physic while working full time with two little ones. I spend countless of hours studying and practicing but for some reason I cannot comprehend physic. My semester end with Ochem:A, human genetic:A, physic ( I was 0.8% from C but the Professor refuse to give me a C, claiming it is unfair to other students). Any advise is welcome.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums