Thanks for writing to us.
The low lying placenta at 14 weeks is more likely to migrate upwards to the upper segment, as the pregnancy
progresses. There is a possibility that it might persist and in that case you might need ceaserean section for delivery of baby. The follow up usg can guide you in this regard.
Also, you can continue to work, as you don't have any complaints.
The third part of query regarding what you read on net, that possibility arises only when there is heavy bleeding, so the baby suffers.
In your case, you should avoid heavy weight lifting, intercourse during this period.
The next usg as per your doctors advice will clear the situation further.
Hope i have cleared your doubts.
Dr. Mrs. Sumeet Baheti