Probably stupid question, but I'm giving myself 1/2ML, which is equivalent to 50 mg, every three days. I am having trouble sucking the liquid up into the needle. I swear it took ten minutes the last two times to get even half a ML into the syringe. I pumped air into bottle via the syringe and turned the bottle upside down, but it takes forever to enter the syringe. What the heck is wrong?