Hi thanks for posting your query.
Placent covering internal oss is called as placenta previa
with Placenta previa is a very high risk pregnancy.Chances of normal delivery are very less as it can lead to sever bleeding during delivery.Caerean section is perferable way of delivery in placenta previa.
A word of advice.You should always remain under the supervision of a gynaecologist and you should avoid all sort of sternious work as even minor trauma can lead to sever bleeding.
Hope this answers your question.