Leis
Here's my two cents worth. You are 31 years old so don't beat yourself up woman! Go and have a nice holiday. With those endo-returning odds - you should go have a nice blissful holiday and not worry about the TTC clock until you get back. If you were 36 - I'd tell you different!

Or here's another idea. (I think you said recently that you were back on the BCP?) Why not choose another (less reliable) method of contraception once you are on holidays, but stay on BCP until you leave.