Question about the Earth Science Regents?

Okay well im studying pretty much all week , b/c i have a feeling i will pass , like 70% sure. I took my lab practical, and i think i got a 10 or higher, out of 16. Im just afraid because i do really bad on part 2's and astronomy. :/ Is the curve big? about how big? And also, i passed the first three quarters (89,65 and 77) but i do really bad on my tests. and when i mean bad i mean im lucky if i get a 59 or above. About a month ago i got my progress report saying im failing :( . Im just scared!! Will the regents help pass me ? And do you think ill pass for the entire year? Please help , im extremely nervous!