Which part exactly is making you uneasy? The reason I ask is that guessing at the source of your worry might just hand you extra things to stress over that you had not even thought of yet, which would work against what you are trying to do.
This might sound like a basic concern and I am not sorry for bringing it up. I have some experience but still enough of a newcomer to wonder about this. Does anybody else feel on edge right before injecting from a fresh vial? I looked into the COAs, did the math, and handled the mixing and filtering properly, yet the uncertainty of the grey market still makes me tense even though I know we are generally fine with our research. Maybe I am just seeking some reassurance here. Keep the replies gentle please.