Missing Periods. On the mentioned date.

I had sex on the following days: 18th April ,after sex i had contraceptive pills. 28 April ,after sex I had contraceptive pill . 5th 12th and 19th may i had sex and did not have a contraceptive pill .  Please note that condom was used throughout the time i had sex. My period usually comes on 10th of the month. Between these mentioned days ,once i had sex while there was minute bleeding. i was able to see the blood stains on the condom. After 19th May I did not get intimate with my partner. Two days back i used a pregnancy kit to check and it was negative. Since one month i have been missing my periods and today there was minute red clot type(more like a thread type) things can be seen when i insert my finger in my vagina. Am i pregnant or will there will be period on the mentioned date.