1st period after D&C

Jess • I`m 28, Mama to Elyse Cecelia 8/8/16🎀 RIP angel baby 8/27/15😇
I'm currently 2 weeks post D&C and my HCG levels were 35 on 9/8. My OB said I should have my period within the next week. To those who have had a D&C before, how did you know it was your period and not more old blood from the procedure? Was it a regular flow of blood or was it more like spotting? Just wondering what to expect.