Scared, confused a bit lost

Hi...I have been around before, but not too much. I have been preg twice now the first one ended up being a chemical pregnancy and the second a miscarriage at 6 weeks. Its been 3 years now and I was due for my AF on the 22nd of Sept. I had a bit of spotting a week or so prior to that which I thought could have been implantaion bleeding. In the meantime my breasts were sore, but not like AF sore. It went on for 3 days...never red always brown... but never enough for a pad. After the 3 days of that, it stopped for 2 days then came back heavier this time like the first day of my AF but never any clotting or bright red...always a dark redish brown. This lasted for 3 days too but not as heavy for the remaining 2 days...it was more like spotting...My breasts stopped hurting for 2 days then came back with a vengance. They are sore and swollen. Now I took 3 FR tests all of which came back with faint lines (a few days apart for each one)....then yesterday I got another and this time a FR digital and it said BFN. I don't know what is going on...I am going to the Dr this week, but I thought I would ask you ladies if anyone had any similar experiences.... I have been going to the bathroom more than normal for me and also some nausia... sometimes a little more tired than normal... I really am tired of trying (although it is fun ;) )and getting BFN results.