I am 20. I've always had irregular periods. After getting a period on 5th June, I had them again on 20 July, d same day I had an intercourse with my boyfriend without any protection. Although he did not in me I'm worried bcoz I didn't get my periods since then. Did a home pregnancy test on 3rd n 4th August but it said negative... what should I do?

Just an error it was 5th June n den again on 20 June itself

While it is not likely, it is possible, but with irregular periods it is so hard to know.

May wait another 2 weeks and test again, and if still negative, you may check with doctor

Is there anything I could do to terminate any chances of pregnancy immediately in case it has occurred

Other than abortion there is nothing you can do since it has been so long since your encounter. However, you don't even know if you are pregnant at this point. You will have to wait to see if your next period comes as expected. If not, take a test using first morning urine.

Agree, you can not do an abortion unless you are pregnant, so you have to wait and find out at this point

OK... another issue... since yesterday evening I'm getting these brownish kind of clots... although very little... n now I'm also getting cramps... could this be implantation bleeding?