My period is suppose to start on Thursday. My breast have been very tender for the past week. I have had some very mild cramping today and tonight I had a very light bleeding. Which to me is strange because my period normally start out very heavy. Is my period just starting light this time around? Or could this possibly be early signs of pregnancy?

We are trying for baby number two and I never got anything like this with the first. Any answers or advice would be greatly appreciated.