It sounds that is a vexing problem. Many reasons can cause red eyes such as lack of oxygen, dusty pillow case, smocking cigarettes. However, the best way to find the exact reason is to see eye specialist right away. It require a careful review of not only your history but also an eye exam. some eye problems are manifestations of other systemic illnesses, so your doctor will want to know about any other new symptoms or changes in your health you have noticed recently. Finally, when considering any kind of eye problem, a full examination including dilation of the pupil is very important. From your description it is not clear if the lining of the eye (conjunctiva) or the white of the eye (sclera) is red, and your doctor will want to use a slit lamp and fundoscope to look inside the eye to identify which part of the eye is irritated/inflamed. Also, if you do notice any vision changes or pain, you should seek medical care at an emergency department.
