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It is not unusual for haloes and glare to last up to 6 months after surgery. There is a small percentage of people in whom it remains permanent. Likewise, dry eyes can last 6 months or longer after LASIK. Genteal is a good brand of lubricant to use.
There are many possible causes of haloes. Dry eyes can cause haloes. Haloes can be caused by a large pupil that dilates at night bigger than the treatment zone on the cornea (sometimes, a weak drop to constrict the pupil helps with the haloes). Haloes can also be caused by abberations in your cornea (called higher order aberrations). I have used yellow hunting glasses for patients at night to help with this. But 3 months is way to early to tell.
Hope this helps.