HCG Levels at 4W5D

Hi all! Just found out I was pregnant on Thursday! I had my HCG baseline level drawn on Friday, and then again this morning. I called this afternoon to get results. The secretary said my level on Friday was 54 and this morning was 236. Is this ok/normal? It seems to have doubled and risen like it should. Still waiting for the RN to call, but so worried as this is first baby after a miscarriage in September. Any info helps!