Why does the middle of my chest hurt when I do chest exercises?

More importantly lower chest exercises. It doesn't really hurt but it gains pressure the more I do. I usually stop cause idk what might happen next but whenever I do a lower chest exercise the middle of my chest gains lots of pressure and the more I do the more I feel I'm getting closer to my heart... show more More importantly lower chest exercises.

It doesn't really hurt but it gains pressure the more I do. I usually stop cause idk what might happen next but whenever I do a lower chest exercise the middle of my chest gains lots of pressure and the more I do the more I feel I'm getting closer to my heart coming out of my chest.
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