Well, generally speaking, there are many people who have the same symptom as you have. For your situation, it would be more likely that when you sleep with your eyes open slightly, in this way, it can allow some exposure into your eyes. So it can cause dryness. As we know that dryness can make your eyes red. Also, this could be related to a change in tear secretion. So you can use an artificial tear, before bed. And in some cases, napping can also do a help to your eyes. If the symptom can still exist, you should see an ophthalmologist as soon as possible. So that you can take an eye exam and make sure what happens to your eyes.
There must be the inflammation for your eyes. You'd better have a good rest for the eyes these days. Don't smoke, drink and eat the spicy food. You should go to the hospital to have a full check on the eyes. I am afraid that your eyes are too dry which needs the supplement of vitamin C.