Why am I having pain in my chest behind my left breast and my rib everytime I take a deep breath?

I've gotten this before too, but I've always just ignored it. I've found that just stretching my torso a little makes it go away. Never bothered me for more than a minute or two so I've just always shrugged it off.

it is a strech pain it will go away in 5 munutes

Sometimes they could leave a medical instrument in you after surgery and it might cause pain. But not always. Thats why they are made out of certain kinds of metal and stuff that won't react with the inner body... such as breast implants.

But also your lung could get caught between 2 things and squezzed if you take a deep breath espechally when ur fat.

If you are still suffering, then do this.
Pray, "Lord Jesus, please come into my life, forgive my sins and make me a new being. I want to know you. Thank you for healing my sicknesses. Amen"
He will respond. I guarantee.
Cheers