a false positive! implantation bleeding?

Kaley
On the 14th I had a feeling to take a test. I took 2! I got 2 false positives with blue dye tests. I have never had an issue with blue dye before. I tested 9 days away from my period. I tested 2 days ago 6 days away. Negative with blue dye & pink dye tests. I have still continued to have heart burn & not feel well. My Ovulation day was the 8th. I am now 4 days from my AF & 11 days from ovulation. I went to the bathroom & had pinkish brown spotting. Now nothing & I have had light cramps & backache. I have had diarrhea all morning. 
I am so confused. At this point. Implantation bleeding!? I only had it with my first & thought I was starting my period but obviously he is 7 now lol