To avoid this in the future you can pin some air into the vial, so when you go to add your bac water, the vacuum won't pull it in like it did for you.
Yeah hyper poses a good question, if that's a generic, sounds like it is, then it's likely a kit of 10iu vials and no..2iu = 2 units not 20 units. (iu=international units).
I feel like, for at least harm reduction, we should verify a few things before you jam that baby into your abdomen.
1) is this a kit of generics and let's work to identify how many units each vial is meant to have.
2) how many iu (units) are you attempting to run a day? And what's your protocol.
3) I see you're using a 3ml syringe to reconstitute, but what are you intending to use to pin, it sounds like the 3ml syringe again. Do you have insulin needles? They can be bought over the counter no pressure no prescription at any pharmacy if you're stateside.