still trying...

Ok so I have been on Met for almost 5 weeks now. I am suppose to start Clomid this cycle as well. This is my first af since on met and it has been really weird. I started spotting thursday night, and have had regular spotting or light period ever since. Today (monday) it has picked up a bit but still not as heavy as it was before the met. I called my doc to see if I should still start the Clomid tomorrow. I am suppose to start day 5, but not count spotting days (usually have one). I am figuring that my af is just light because of the Met and the nurse said I could go ahead and start clomid tomorrow. I think this is because I talked her into it. So here is my question: is my af just lighter because of the met? Should I still start clomid tomorrow night? Any help, advice, input, or experience would be welcome I am desperate!!!