cetrotide a little late HELP

So I'm on day 8 of meds I was told I could not take cetrotide a minute late they have told me this numorius times.. well I had to take it in the car today and the needle would not take the liquid I had to speed home and get a different needle and ended up being 2 min late I no it doesn't seem like much but I called and told them and all they said that don't THINK it will be a problem and just kept saying that.  Has anyone been late I'm just freaking out right now and I no that 2 min doesn't se like a lot but the way my doc office was talking they scared the crap out of me