Is there any chance it could just be a piece of the rubber stopper? My last homebrew i had a small piece of the rubber stopper come off into the vial while filtering the tren into the sterile vial with an 18g needle. I've just been watching while i get out the oil, and making sure I don't accidentally get it as well.
If not, and it really is something like a bug (gross), i'd definitely either stop using it while trying to sort it out with your source, or possibly take it all out (minus the bug/piece)... heat it up, and then filter it into a new sterile vial. Definitely disturbing if it is something aside from a piece of the rubber stopper