How often can I take Lantus?

How often can I take Lantus? My prescription says take at night. BS last night was 445. Took 100 units and is 330 this morning. Can I take it more than once per day to lower my BS? Can I take more this morning? I have not been taking Lantus regularly as I should have been. I’m now back on a low carb regime after having been negligent for some weeks.

Age: 75
Male
Medications: Lisinopril-Atorvastatin
General Information: Type Two Diabetis. No other major health issues. 360 pounds.