Should I take a pregnancy test? (LONG)

Jackie
I had sex with my bf on the 8th, 9th and yesterday I also had sex(both protected). Yesterday I had sex twice in the same day(once around 4pm and one 11pm) and again protected both times. He always pulls out before he comes too. After sex at 11pm I went to the bathroom and when I wiped I got some brownish blood that came out along with some chunky discharge. But only one time. Second time, it was bright red when I wiped. 
I got scared and took plan B for the sex we had yesterday around 4 in the morning. 
I want to take the pregnancy test to see if the brownish blood discharge was from implantation bleeding. Should I take one? Or will it not read correctly because Im so far away from my period? (Im on my fertile period:: will have next period early October) 
Please help me. Im so scared.