spotting

[AP30]

af was due on 11th. I am spot on 28 days. on 12th I had light pink,bit dark brown spotting only when i wipe (sorry tmi). 13th nothing much except for very light brown spotting again only when i wipe. 14th again light pink/red spotting when i wipe but more than first when it started. No cramping or pain. Swollen Breasts. I normally have very heavy and painful periods. has anyone experienced this. I have been getting bfn only. Any information would be great. Thanks. Sorry I am new to this site and so was not sure which forum I could post this and have posted it multiple times hoping someone can answer