AM I PREGO?? IM CONFUSED PLEASE HELP!!!?

ok AF was late last month (june)...it was supposed to come on the 7th but came on the 12th.it ended the 16th i BD wit my hubby on the 20th and 23rd....on friday(26th) i had abdo pain on the left side...im guessing i was ovulating, cuz i was supposed to around that time anyway. i started cramping sunday(july 5th) but it wasnt much jus very mild less than normal. on that tuesday, i started spotting brown discharge not much just less than a normal period. it went on and off the whole week from las tues.and still goin now ...yesturday or today i expected AF to come but didnt...im glad it didnt but confused as to whats goin on. ive been real gasy and my are tender. just a lil nausea everyday, but nothing big!! i tested last wedsday,this past saturday and yesturday...all resulting in negatives!!! please help and give some great advice!!!