Pregnancy after Loss

Is it possible to get a false positive pregnancy test after a month of a miscarriage? We lost our baby at 8 weeks on Sept. 11. And I took a new test now and it flashed a big positive on the test. I'm nervous and excited and do t want to tell my husband yet. I plan to call my doctor tomorrow but wanted to find out how many fellow mommies have had a pregnancy right after a loss.