Is it possible to get pregnant 12 days before the period is due? I had sex on the 30th and 1st of June and my period is due on the 12 of July. What are my chances of getting pregnant? I'm currently feeling upper back pain, sudden mild abdominal pain

There is some chance. It can be hard to tell if a woman is pregnant because some of the symptoms seen in early pregnancy can also happen in non-pregnant women. A urine pregnancy test gives a reliable result if done correctly. One can test about 3 weeks after sex (when conception might have been), or 1 week after missing a period. That said, back pain is not a symptom of a brand new pregnancy before a missed period.