Bright pink spotting

Rebecca
Noticed today a very small amount of bright pink blood when I went for a wee. There were two separate dots both about as big a the nib of a pen. I have never experienced this before and the colour was almost the same as a pink highlighter. I am due on in 4 days and just wondered if anyone else had experienced this before? Could this be implantation bleeding or am I maybe pinning my hopes on maybe being pregnant?