HCG still not at 5 or below 7 weeks post d&c

JWR
This is so frustrating. 7 weeks post d&c and my HCG level as of yesterday is now 7. Which means I go AGAIN next week for another blood test. Had an ultrasound last week to make sure no tissue was left and nothing found. I had my d&c at 11 weeks but baby stopped growing at 5 weeks. Anyone else had their HCG take this long to drop under 5? Doctor wants me to wait a cycle before trying again and I'm getting anxious ...and annoyed at my body. Doctor also just scheduled me for additional tests to see if there is something else going on to drag this on...