How would you know that you must get your blood sugar/pressure checked.. what are the symptoms?
Since last 2 weeks, i have been feeling dizzy, sleepy and tired.
A combination of things. Dizziness and sweating can be indicative, but a main one is an unquenchable thirst. If you can’t stop drinking, get it checked.

low blood sugar you would be shaking and for high blood pressure your cheeks would be beat red.
References :
Diabetic mom
High sugar – frequent thirst, water drinking, and urinating.
Low sugar – irritable, shaky, nervous
High bp – tingling, throbing arteries, general "funny" feeling.
Low bp – dizzines when you stand, bend over.
References :
A combination of things. Dizziness and sweating can be indicative, but a main one is an unquenchable thirst. If you can’t stop drinking, get it checked.
References :