Well i'm abit new to give any advise, only 9 months into now, but this i can handle, as i too experienced this, however, i studied up on it, and best advice i found on this site, which turned out to be accurate, was simply to push thru it, whether it was altitude issues, anxiety, stress or whatever, i always had a knot in my stomach, early on, didnt want to eat or drink. However, i had a goal and kept at it, and slowly but surely things got better. i did discover that the 360's as fun as they were under canopy, didnt help me much at all early on, that as well contributed. Sometime about or i believe jump 27, i remember looking at one of my instructors, Andy, and just saying to him with a smile, "its happening, i'm not scared, i feel good, and i cant wait to get out that door" everybody is different, but that was it for me.