hey guys i'm finally on my first cycle of sust 250 i had my 4th shot today and i did everything by the book but when i put the pin in my quad i drew back to check of blood and what looked like a bubble popped into the chamber as i was going to pull it out it went back in to my leg silly i injected it in due to knowing there where no bubbles to start with.... its stressing me out can i die from a bubble please help!!!!!![]()