Questbridge/College Chances

I am really worried because my one class is really bringing down my grades. I am a junior and have had all As and Bs in one of the hardest schools in the country for all three years. I will have taken 7 APs by the time of graduation and 9 AP tests. My SAT scores are pretty mediocre but I got and somewhat better 31 on the ACT (both of which I still plan on retaking). I am from a low income family and one of the only ones in the school. However for the last two years due to test anxiety and external stress due to circumstances, I have gotten a C+ and now a D in math. I seem to be really scared every time I take the tests and I don’t know what it is. But now due to these two grades, my GPA has suffered severely and so has my anxiety. I just want reassurance from people who got into good name colleges (bc my parents really want me to go to a good university) or even Questbridge with similar scores and grades that I still have a shot and that I did not screw up my life due to two grades.