I had my periods on 22nd september, then I had unprotected sex on 26th, but ejaculated outside, then had unprotected sex on 27th and ejaculated inside, then I took ipill on 28th. On 10th october I had a very lighter flow of period for three days, it was so lighter that a pad can be worn for 2 days. My menstruation date is supposed to be 17th october, so I thought I will have a regular flow on that day, but now it's 20th october I didn't get my period. Is there any possibility of getting pregnant? Please help.