so confused

I went in last week for a positive pregnancy test and my hcg levels were 40.7 two days later they only were 47.6 not high but going up. The dr told me to expect a period. What how you just said I pregnant. Ugh so frustrating. I did end up bleeding for two days but just normal period like nothing to bad. My question is I just took a test and it's still positive. Thoughts please. Mind that I have had two miscarriages feel the bleeding was not the same. Advice please???