For anyone who is already on the shots, I know it is recommended to get it the same day every week but is there any leeway with that? Like can you get it a day early or late? I am getting my first one tomorrow (Thursday) and my worry is that at the end of the month I will be on vacation and won't be able to get it until a Friday. Obviously I am going to ask my dr this tomorrow but I was just curious of any experience you ladies had with this. Thank you! :)