The white my right the eye has a red patch :((

To my surprise this morning, there something red in the sclera (white part) of my eye. Right eye, below portion of the eye.

Since yesterday, I have been feeling without energy, but I haven´t had any headaches. This morning, I still feel without energy.

Could this be the pressure of the eye? What else could this be? I am really worried! Advice, comments and suggestions are more than welcome!