So, I need some advice Please!

Ronna • SAHM to my amazing 3 year old Princess. Baby Borja #2 on the way. Due 12-31-17
Yesterday was once month from D and C and been spotting for a week with AF like cramps, still getting a faint positives, have follow up with docthis week, they don't draw blood for levels, should I ask?? Any advice!