Suggestions please !!!

Shobha

Hi All

It has been since last week my back is heavy and started having joint pain for the first time.

Also i feel some dizziness,my head remains heavy and vomiting from day before yesterday

I ovulated on 18th and when did pregnancy test today it shows negative.

Is it possible that by any chance these are sign of very early pregnancy and after how many days we should ideally take test?

Suggestions please