Alamak, this is so stressful kan! GDM readings yang inconsistent macam ni mmg bikin worry, a few of my mum friends ada experience gak, and usually boleh jadi sebab timing makan, stress itself (which raises blood sugar!), or the meter itself kena calibrate. Best thing is report to your doctor or midwife straightaway, jangan tunda, sebab dia boleh check if it's the device or if your levels really fluctuating that much, and they might adjust your plan. Hangga tu, just try keep consistent with meal timing and portions, and breathe lah, stress juga boleh affect readings. Hugs, mama, 34 weeks ni final stretch!