Welcome here on Health Care Magic Dot Com.
I am very much concern of your problem.
I think I will certainly able to help you out of this condition.
In my view you got your pregnancy
test done lately at the time when you were in fertile time.
So you got the pregnancy and were declared negative.
Now you have no choice except MTP
It is very difficult and costly to ascertain the damage done to your baby.
So consult any MTP centre.
I will suggest you to visit your family physician and get examined and treatment properly.