Possible miscarriage confusion

Patient: I had what I thought was my period from the 3rd to the 6th. On the 8th I began spotting brown and on the 11th I found out I was pregnant. On the 14th I began bleeding again and went to the ER where they told me my hCG level was at 50 and they couldn’t see anything in an ultra sound. I stopped bleeding on the 16th and started spotting brown again. I had more blood tests done today (the 17th) and they said my hCG is now at 24. Is there any way this is not a miscarriage?