HCG (someone please help)

Well in another thread I was told since I will be running my cycle 19 weeks I should start HCG now and take 500 iu every third day.
I have the HCG ( 5000 iu) and the 2 ml physiological solution. I live in the states and have no idea how to get a filter, 20 cc cyringe, sterile vile etc to dilute the HCG to 500 iu.
How can I dilute this solution fast so I can start taking 500 units every third day. I am in week 9 of 19 ( starting clomid in week 19)
SOmeone please help. I would have to like .2 cc's and that much would get stuck in the needle.
Thanks

Is all I need to order is ba water and a sterile vial to make this 5000 iu to 500iu per ml