Okay

so on 03/03/13 me and my boyfriend had sex, we did not use protection but he did try the pull out method. On 03/09/13 we had sex in the day, he pulled out because he thought he felt something which turned out to be blood which has happened to us twice before. I bled for a while then it stopped. The same night we had sex two more times, he did not pull out neither time and i did not bleed. Later on i went to use the restroom and when I wiped I had dark blood which is more spotting and I also had dark brownish discharge. Today(the day after) I am very lightly spotting and still have discharge. My period is unregular since I got off the pill 3 months ago, my last period was 2/14 and only lasted two days.

 

With the blood, I'm not sure what is going on. After doing some research, can I be implanting from the time we haadd sex on 03(03? Is there a chance of me getting pregnant?