Miscarriage. All come back negative.

On 3/15/17 I discovered that I had experienced a missed miscarriage, I went to the doctor for an ultrasound and they found no heartbeat, the baby measured only 9 weeks and 3 days when it should have measured 14 weeks. On 3/22/17 the doctor gave me Misoprostal at 11:30am and I began bleeding and passed the baby by 3:00pm. I had light bleeding after that for only 2 days. It's now 4/29/17 and still no period. My HCG levels tested at 23 on 3/31/17 and tested 9 on 4/13/17. I have had a couple days of light bleeding fr only about a couple hours before it stops again. Those dates were 4/22/17, 4/25/17 and 4/27/17 and have had very light brown discharge only when I wipe since then. I am going in next week for more blood work to follow my HCG levels and I have taken a few cheap pregnancy tests that all come back negative.