Possible Pregnancy After Abortion: Understanding Period Irregularities

Question
I had a medical abortion around the 26th of august. I was about 6 weeks pregnant. I bleed for about 3 weeks in September & then had a period around the first of October( i guess it was a period). I had unprotected sex around the 16th of october(pull out method). I was expecting my period around the end of this month but it hasnt showed. I have took pregnancy tests but they all are negative. Is it a possibility that I could be pregnant again or is this irregular period normal. Ive had abortions in the past but never had an irregular period with any of them

Answer
Both are possible.  You could have an irregular period or just have an early pregnancy.  You should repeat the test in 1 -2 weeks.  Remember that the pull-out method (withdrawal) is not a reliable contraceptive method.  Men can always leak sperm even if they have not ejaculated.