I need advice about my hormone level...

Tabitha
I found out I was pregnant on April 1st, 2016! My first pregnancy! A week later my back hurt so bad and stomach cramped all day but it went away. Two days later the bleeding began and I was told I was miscarrying at 6 weeks. Blood work at the hospital when I started bleeding was 147. Two days later it was 43. A week later it was 6.7. I go back in 3 days to see if it has went down. I've heard ppl on here talk about miscarrying because the hormone levels DONT rise fast enough and I'm wondering if this is what has happened to me and if its likely to be an issue again? The miscarriage was natural and I was done bleeding in 4 days. Any ideas? Does 147 sound right for being 5-6 weeks along?