+1
If you have high blood sugar and ketones, you should get yourself to the Doctor immediately.
What exactly do you mean by "4"? Is it 4mg/dl on the Ketostix chart?
If you mean the 4th box on the chart, then you need to go straight to A&E.
I was in a similar position, when my GP tested my urine, at my diagnosis meeting and discovered ketones at a concentration of 15mg/dl ("small" on the Ketostix label). I thought nothing of it until I got a call from the Diabetic clinic, asking me to come immediately, and be prepared to be admitted into hospital that afternoon...
Luckily, in my case, the ketones were a result of me "low carbing" (at that stage <30g a day), and their concern eased as soon as they saw that my BG levels were under control (<7 mmol/l). However, they warned me that if my blood sugar went above 15 mmol/l AND I recorded ketones of 80mg/dl or larger then I should go straight to A&E.
The Doctor told me, that they sometimes see patients who fit all the symptoms for T2 but are actually T1. This probably isn't happening in your case, but you need to be very careful.