I did the same thing! This forum is pretty down on F.i.nnnrick labs, but you can send a vial there for free to have it analyzed for mass and purity. Adding an endotoxin test is only 110 dollars. I ordered directly from China before I found this forum as well, and I felt very uneasy testing peptides with no confirmation that my white powder was what they said it was. I would recommend doing that as a minimum to see how much overfill or underfill you might have gotten. If you have a little more financial wiggle room, you could send a vial out to a specific lab, such as Janoshik or Trust pointe, for results that are more trusted in this space. I personally have been very grateful for F..I..nnnnrick, particularly in the beginning of my adventure into greyland.