Implantation or early period?

I woke up this morning and had some spotting. I thought I was getting my period early, which is weird because I never bleed early. My fiancée and I have been trying for 8 months. Well this morning when I woke up, I went to the bathroom and saw a little blood. I wiped and just a little was on it very light pink. I put a pad on and it’s been 4 hours and there is no blood now... I’m confused. I’ve never been pregnant before so I don’t know. I took a test yesterday and it was negative. Help?