Thanks for your query.
One possibility is that you are having a vaginal or pelvic infection
Normal vaginal discharge
without odour or itching is physiological in pregnancy
, and nothing to worry about.
However you should not be having lower abdominal pain
with cramps, as that is not normal.
SOme amount of pain and discomfort is usual as the uterus grows in size and stretches to become an abdominal organ.
However, cramping is not normal.
It could indicate a subtle infection.
If your scans are normal, and cervical length is normal, chances of it being indicative of an abortion or miscarriage
are very low.
Please consult your obstetrician for detailed evaluation and diagnosis.