How do you not think about something so important

So according to my supermom, today would be the day to conceive a baby (I'll keep this G rated) and I trust her advice more than anything, because let’s face it, she blinks and becomes pregnant.
Everyone keeps telling me not to stress, that it will just happen, but how do I just turn my mind off. I feel what I am supposed to feel (according to my mom) and I know that it’s time to get it on with my husband :) but then I have a whole month to just wait and see. It drives me crazy. And the worse is when I am told, just don't use any protection and keep at your normal sex lives and when the time is right, you will conceive. But Hellooo if I KNOW when the time is to conceive and I have sex during that window, then, of course I am going to be anxious each any every time.
Hopefully since my 21st birthday is coming up and I am going to see my bestie in NC next week, the time will go by fast and I won't stress too much.
I don't know, I just hate the hoping and wondering and then having it all shot when you pee on this little stick I have come to think of as the enemy.
People wonder why we want to have kids so young and why we don't just wait. But Danny and I both adore kids and we just want to start a family and bring a child into a loving environment.
We were going to become foster parents and hold off on starting our own family, but Danny didn't think he could handle loving someone so much and protecting them, and then just letting them go. I tried to explain to him that even though it will be a very difficult thing to do, we would be helping these children and giving them something they need more than ever, love. However, most people didn't grow up with parents who fostered kids and then came to have such a big family so I know it's hard for him to see it like I do.
So after work and school today, I will be home with my hubby to do things I will keep unsaid :). Wish me luck... with the conceiving part, I don't need help with the process, I got that department down :)