10 weeks empty gestational sac brown discharge

Went in for my second U/S. Doc found an empty ges sac. Having light brown discharge. Took a blood test to see my HCG levels. Going again in 2 days. This is my 3rd pregnancy (1 miscarriage at 7 weeks and 1 success). I'm totally freaking out trying to distress and praying for a miracle. Anyone with similar stories? TIA