I think my bleeding hart tetra is pregnant cuz it got very taritorial and is at the bottem of the tank help?

Tetras are not live bearing fish they do not get pregnant. It may be doing this because it is being picked on by other fish or it has some sort of illness check over it's fins and body to make sure everything looks normal. Also check the ph nitrate and ammonia of your water, and your water hardness. Tetras like soft slightly acidic water so this may be your problem.