I've been on Lantus for about a year now and never tied things to...

I've been on Lantus for about a year now and never tied things together till reading this. Ive had horrendously blurred vision though the eye doc says my prescription hasn't changed. I have bad bad backaches, and though my A1C is right at 6....my morning blood sugars run 130 to 185. At no other time of day is my blood sugar over 110. I don't understand this. WHY would a bedtime blood sugar be 75-90 at 9 pm.......and at 3am is over 140? Its like the Lantus does nothing. I just don't like the side effects with this stuff.