my chest is heavy

My chest is heavy, it feels as if a car is on top of me. My eyes feel like they can fill with tears, enough for a river. My body feels as it wants to give in, wants to let go, wants to cry. Why cant i? Why cant i let go? My mind wont let me, my mind is to strong. I cant let my self get weak, show weakness. I don't want to be strong right now, i want for just one moment to be venerable and just let my self go. Why wont this feeling go away, my chest aches, it burns, is it my heart telling me something; something my mind doesn't want to hear?