Help!!

So Last period started on August 6th lasted 6-7 days ending on 11/12th. I started brown spotting and dark pinkish spotting on 21-27th not enough for a period as it was only shown when I wiped. I also took a pregnancy test after I finished spotting and I got a faint line a few hours after taking it then went to the doctor to get a qualitative blood test and that was negative...Anyways I’m 1 day late for my period this month.. do you think the mid cycle bleeding could of been my period? Or no? I’m confused... I’ve been feeling some pinching and pulling every now and then down in my lower stomach and my lower back has been aching on and off. My boobs also ache randomly but stay heavy and fuller...