I'm almost 7 weeks also and I'm doing the same thing. It's not horrible and it comes and goes. I also has a c-section previously. I also have some mild cramping occasionally, not sure that it's related to spotting because the two don't always coincide. I did read that taking extra vitamin c can help to strengthen your capillaries and help bleeding. Also, some women around week 6 can experience a type of implantation bleeding. Don't know if it helps but it eased my mind a little until I can get to my doctor.
I would monitor it. Call dr if it lasts a few days ir call dr immediately if blood turns bright red.