TTC..HOW LONG DOES IT TAKE

I just turned 24 on the 1st. I was wondering how long it takes to conceive? We just started this month! We are going for The Shettles Method, trying to have a girl this time! We had sex on the 18, 19, 21,22,23 and 25th. I ovulated on the 27th. What ya all think?? I noticed the last few days my back is killing meeee, and my stomach has been slightly upset with a few cramps here and there.