I will be doing an IVF realy soon and was told to take an HCG shot at a specific time, 36 hours before retrival. I was supposed to take it at 7:30, but I had to take it 30 min earlier( I couldn't find anyone to give it to me and when I finaly found a nurse, she didn't want to wait until 7:30 because she had something else to do, and said shes a nurse and she knows that 30 min wont be a preoblem) , but I'm worried........is 30 min earlier be a big problem??