I just got a few of these (HUCOG) 5000i.u. in today, and I have a few concerns about them. First, they appear to be pre-mixed. They're sealed in a plastic & foil pack, but what I see looks like liquid in the vials not powder. I wasn't expecting it to be pre-mixed, so I'm a little worried about the quality due to possible exposure to heat. It's been 22 days since they shipped it out, and it's the hottest time of year where I'm from. Also, they didn't come with any solution for mixing, so are they ready to go or do I need additional solution for mixing further? I've never used hcg, so I just want to make sure I don't make any mistakes here. I was expecting to get hcg in powder form & that I'd have to mix it myself. So, I'm a little unsure of what to do with these bad boys. Any tips or info will be greatly appreciated.