Hey mama, at 70 kilos and 5'2" you're probably on the heavier side for your pre-pregnancy weight, but honestly the important thing now is that you're gaining at a healthy rate during pregnancy, most doctors want to see steady, gradual gains rather than focusing on the exact number. At 19 weeks you're still in the first half, so best to check with your OB what your healthy weight gain target should be based on where you started, kasi bawat mama and baby situation ay different talaga! A few of my mum friends were worried about the same thing pero their doctors reassured them as long as baby's growing well at regular check-ups, everything's okay.