What Causes Sudden Elevation In Blood Sugar Levels?
How long does a reply normally take?
Stress
Detailed Answer:
Glucoses persistently above 250 are a matter of concern especially with symptoms signaling trouble such as shortness of great, nausea, vomiting, abdominal pain and dizziness.
A reading of 292 with the problems you are experiencing is of concern. Ideally you should call your diabetes care provider and see what (s)he would like you to do.
When I see someone like this in my practice I have them check frequently and use fast acting insulin in specified doses that I give them as a year-round 'rescue' instruction sheet. This insulin is different from Lantus.
Further it is important to determine the cause of the elevation. Stress can be a contributor. Often it is infection too. Appropriate evaluation to look for this is necessary especially if your high glucoses persist along with the symptoms.