My last cycke was Nov 21. I was due Dec 19 and didn't fet it so I took a test and it was positive. On dec 23 I had a blood test it was 112 hcg and on dec 26 it was 287 hcg. Are these levels normal or low? The way my doctor makes it sound as if they are low. But they are doubling every 48-72 hours. Any input?