Hcg levels.

I had to go to the ER last week. I was having pains and 5 days late for my period, so I went and did all they asked and found out I'm pregnant. This will be my second. They did a blood test and found that mypebels were at 61. Then they checked 3 days later and it went to 300 something. Yesterday I went to get another blood draw, this will be 3 days later and I'm hoping its higher. They say they probably isn't caught it early so no worries. Has anyone else had this situation before? How did it turn out?