Pregnancy/Abortion

Patient: Hi,I had unprotected sex with my GF. Her periods started from 23rd of May and it was almost over after 2 days. We had first unprotected sex on 28th and she took a pill after 3-4 hours of sex. Next day again we did it without protection and she took a pill again in 2-3 hours. She just told me today that she got clotting of brown color with blood coming out. She had not done any test yet but is it the sign of pregnancy ? If yes then what is the possibility of abortion with pills. We are just 23 and not ready for a child. Need the response soon. I am in quite a bit of tension.

Symptoms: abdominal pain, back pain, fewer

Doctor: