Pregnant?

Okay so my husband and I used the withdrawal method on May 10th & 11th. On the 22nd I started having light spotting that was pink with some red, not even enough to fill a pad only happened a few times when I wiped (as pictured) that lasted for about 2 days. My period was suppose to be here on the 26th and hasn't made an appearance. I took a pregnancy test on the 25th that said negative but I think it was too soon seeing as I'd only be two weeks, what do you think?