Will a D really hurt my chances at a good school like Purdue

<p>So my junior year I got a D in regular pre cal. ( worst grade I have and my only D)Ive never been a strong math student, not majoring in anything math related anyway. I had lots of family problems so I fell behind and ultimately gave up and decided to retake it, only I cant retake it before I send in Apps so it will be on my transcript. My GPA is still a 3.6 and I'm taking AP Cal this year and I'm doing much better in it than in Pre Cal because I'm trying harder. I currently have an A ( its been 3 weeks but still) I only have on school EC and thats Athletic Training which I plan to major in. I devote 3 hours a day after school to it, and I also work so not much time for other activities. I have church activities I could add also.My test scores arent that great but I'm retaking cause I wasnt really focused the first time due to family problems again, which caused me to have a horrible junior year.</p>