I took Contracept for the first time and regretted

I took the contraceptive for the first time and I regretted, do you have another medicine that reverses the situation and that makes me pregnant? I took one week after menstruation and after 3 weeks I had sex without a condom and it was several times for 4 days, then I menstruated, except that it delayed my menstruation for 30 days and yet I feel my stomach ache and hard, things I have never felt before . Can I be pregnant? Is there any medication to take the effect of Contraceptive and I can get pregnant?