8w1d, spotting, have had 2 previous mmcs

So I just started spotting light brown yesterday, a couple times while going to the bathroom. It was more in cm than blood. I'm concerned because I've had 2 mmcs prior that all started that way. The only difference right now is I still have the sore boobs and symptoms I've had. They checked my progesterone and said it looked great and just told me to keep an eye on the spotting until my appointment next week. Should I be worried?