Doctor, I Am A 30 Year Old Married Woman,I Had

Doctor, I am a 30 year old married woman,I had protected sex on the day of my ovulation that was 4 th of august, then again we did it on 15th of august, we were still using a condom. My period date was 24th but I started bleeding yesterday , on 19th. I do not have the breast tenderness or nausea and such like pregnancy symptoms. and the nature of the discharge is not dark red like mentioned about implantation bleeding. I would like to add, that presently we are going through a lot of emotional stress, which is believed to affect the cycle. What are the odds that I could have concieved ? We do not want kids right now, hence I would be very obliged if you could guide me regarding medical abortion , in case if I'm pregnant I would like to know the name and dosage of the pill.