You need to see your doctor. It could be any of a number of things (e.g., astigmatism, the start of cataracts, diabetes, Vitamin A deficiency, zinc efficiency, etc.), but it does sound like the start of cataracts.
See this entry from WebMD: The first symptom of cataracts is often decreased night vision. The light distortion caused by cataracts also frequently produces halos around lights -- again, mostly at night. Blurry vision is also common.