Help me and my boyfriend

Okay me and my boyfriend are trying to get pregnant but we think we are cuz I have been having moodswings, backache, headaches, pelvic pain here and there, bloated, and my boobs are bigger than they usually are and heavier and filler, my period was June 10,2016 but my period came again on July 12,2016 but it was suppose to come on the 8th and been having this brown color here and there......we took hpt and came back negative and took a oulvation test and came back with both lines....so plz help us we wanna knw