Implantation Bleeding

KayDee
If anyone has had implantation bleeding what did it look like?
If I had it, mine was a dark brown with reddish color and it had clear fluid with it. 
I took a test and got a unsure line I'm going to wait till Monday  to be sure. 
If this is my period it's never been like this my lower stomach is tight and I just feel constipated not so much cramps.