I am 39 yrs old. Took a Home pregnancy test on 2/20 which was positive, contacted my FP and she confirmed and took blood for HCG levels. The levels were reported at 19275. On 2/22 had another HCG test done and levels were only 19305. My LM was 12/31/09 which would have put me at approx. 7weeks. Due to slow increase and concern of FP went to Hospital on 3/1 and had u/s - no heartbeat detected and fetus measured only 6 weeks size. Was Dx a missed miscarriage due to HCG levels, LM and size of fetus. I am RH neg, so was given shot of RhoGAM on same date. 3/5 Finally got results of HCG levels taken on 3/1 are 24562. Can you have a missed miscarriage and HGC Levels still increase by that amount? Is there hope of a incorrect dx?