I'm using Bydureon weekly injection pen. Prior to this I was using daily Byetta. I used to pinch my abdomen skin for Byetta injection pen. I did the same for my first Bydureon but there was a lot of liquid came out. So I checked some YouTube videos. They don't show in any of the video to pinch the skin. So this week (second week Bydureon) I tried without pinching the skin. Still there was some liquid & blood came out but not that much. I don't know what I'm doing wrong? Should I pinch or not to pinch?