Implantation bleeding or AF??

Andrea
This morning at work I went to the bathroom and noticed I had dark brown spotting in my underware when I wiped it was clear with a very faint pink tint I haven't had anything since then. I've also had some light cramping, the cramps aren't painful like they normally are when I'm on my AF they are pretty light. My AF isn't due until the 9th according to glow I had my first round of clomid last month and have been TTC for almost 2 years so of course I would be thrilled if this was in fact implantation bleeding but I'm so unsure...