pregnancy?

Dear Doctor, My last period came at 29 of September AND lasted about 12 days. As far as I know the period before came at the beginning of September. As soon as my last period ended, my husband AND I tried to get pregnant. In the last three days I have been suffering from very strong pains in my back AND my lower AND middle stomach [I can’t sleep AND I have heartburn {“tzaravet”- in Hebrew}]. However, I didn’t get my period yet. Today I did a home pregnancy test AND it came out negative. Could I be pregnant? What could be the cause of my pains? What is the earliest date to do another home pregnancy test? Thank you very much for your answers, have a wonderful week

Earliest date to do another home pregnancy test is in a week This pains are not the signs of a early pregnancy so you sould be examind by your doctor