HGC Levels?

I'm a little nervous, I had a blood test done last thurs (3+6) and I was at 78, they did a second one Saturday (4+1) and it was 132, the nurse said as long as it is going up at least 60% that it is normal, because it doesn't necessarily double every 48 like we always hear, it doubles every 48-72. I'm still nervous though, and they scheduled a 3rd test this coming Saturday and will schedule an early scan after that. I'm concerned because my dr doesn't normally do early scans. Can't shake the anxiety and can't seem to let myself get excited about the pregnancy yet because I'm scared, ugh!!!