I will keep you in my prayers. I understand that it can be incredibly hard to live with non-Christian parents. Brutus was probably too young to remember what our house was like before our dad got saved. Though I do not have any experience with being persecuted by my parents for my beliefs. One thing I have learned in my relationship with my parents is that 'honoring' as we are told to do does not always mean obeying. But it took a long time for me to figure that out. It also took my mom an extremely long time to admit that she will not always steer me where God wants me to head, because she is my mom and has her own plans for my life.
God is never going to give you more trials than you can handle. And whatever heartbreak and pain you suffer now, he is molding you. The Potter's hand just may be pinching and squeezing right now. You'll make it through. You never know, maybe this pain is your witness to your parents, planting seeds you may seen see grow. You mentioned wanting to be a missionary. Maybe this trial is preparing you for what is to come.
Stay strong, even tears can be a sign of strength.