Helppp ! Am i pregnant?!?!?

(thus is gonna be kind of long) Okay so my last NORMAL CYCLE was at the end of may then June 30th-July 4 i gad bleeding again but it wasnt like a normal period it was just brown/light brown blood the whole five days and i had no cramping like usual then 2 or 3 days later i get the SAME bleeding for the same amount of time , then it stopped and from that day in july until this day 9-8-17 i havent had any bleeding except a few days ago i had some brown/light pink in my discharge when i wiped ! Ive tooken 2 clearblue test and they both came out negative so i dont understand why i didnt get a period for august! has anyone else havw this happen to them or something similar ? Im currently TTC so im just wondering if i should go get some blood work done or not ?