Why sugar at 4.3 mmol/l already feel so terrible and shaky?only diagnosed w prediabetes

Few thoughts: u may be getting Low blood sugars, especially if u are not eating enough. 4.3mmol/l is barely even PreDiabetes, so it would make more sense that ur symptoms are from low blood sugars. The best thing to do is to check ur blood sugar when u have these symptoms. Also to have ur HgA1C checked which would provide a three month average for u.