Trying....

I had lost a baby in May 2014 now we have been trying again and this month we are trying for the last time and if not I'm going to get on birth control and we will wait a year or two to try again. I'm so anxious and I want a baby. This week (tmi) but we've been having sex a lot bc of my fertile window and it ends tomorrow. Im just so nervous to wait two weeks to see if we're meant to have a baby or wait. Im so nervous... So if I really want to know, when's the best time for a tests when you're waiting?