bfp yesterday with faint lines then I wiped today and seen some pinkish blood

Rebecca
Could the pinkish blood be cervical mucus or am I going to be having a chemical pregnancy and that's the only reason why I had a faint line on test. 
Also should mention yesterday was the only day my tests came back that I was pregnant. I took 4 . But have been taking tests for the last 2 weeks all negatives till yesterday.