Hi I'm 3 weeks 3 days late I have always had a regular period so this is very strange also I have been having unprotected sex. So today I'm 3 weeks 3 days late I was due for my period 20 Nov and 2 days after I got what they call implantation bleeding/spotting a streek of brownish to dark brownish blood/discharge 5 days after I had a pregnancy test done it came up negative than 8 days after another 2 still negative yesterday morning when I first got up and went to use the restroom as I wiped I got this light pinkish blood on the TP which was very shocking and strange as it has never happened before I then took a tampon and pushed up pulled out and there it was pinkish blood/spotting nothing further for the entire day today after using the restroom about 5 times as I wiped I got redish light red almost looking pink on my TP as well again I took a tampon in and out and there it was red blood looking like my period I then through on a pad and for almost a whole hour I've been checking it but there's no sign of blood at all also when I get my period my lower back and stomach cramps and also my breast and nipples are very swolen and sore yet I've had no symptoms of pregnancy nor periods although my breast is a slight bit tender and to me looks a bit darker but I'm sure that's just mind tricks. Please any advise?

Spotting is actually a sign of a std and so is cramping , you should go to the doctor .