I noticed about 4 days ago, that the corner of my eye (near my nose) was really red. it hasn't gone away and it don't hurt. should i be worried?

Bleed: This is a sub-conjunctival hemorrhage. As long as the vision is unchanged and there is no pain, everything should be fine. If it is a little irritated, then you can use an artificial tear up to 4 times a day to lubricate. This is due to a blood vessel leaking blood and is usually without cause. Sometimes straining or blood thinner can cause this. If it continues to happen, follow up with eye md.