THe water that comes with the 5000iu fertigyn is it bac water, or something else? Because im about just mix that water into the hcg and use it for like 6 weeks or so then another mix for another 6 weeks , because i heard that hcg wont last long in fridge only about 4-6 weeks. I have 2x 5000iu fertigyn hcg kits (hcg+ water that comes with it)