I need HELP!

Three weeks ago I was told I had a Blighted Ovum. My HCG levels were at a 40. I was 9 weeks but was only measuring 6 weeks. I decided to have the medication that would make me miscarry. I passed several clots but only bleed two days. I went back to the doctor yesterday and they did a urine pregnancy test which came back positive so they sent me to have labs, which showed my HCG levels were 5000! Could I be pregnant again three weeks later? Or could it be left over from the last pregnancy? PLEASE HELP