Hoping this month

So, we're finally serious about trying to get pregnant. I went off the pill in May and did not want to get pregnant until after our honeymoon (after 2 yrs of marriage) in August. My periods have always been pretty regular. So I got my period on Sept 4th like normal and then I got it again on a Tuesday Sept 29th, which was a little unusual, because I normally get it on Fridays or Saturdays. So according to the chart, I was fertile from last Wed the 7th of Oct until this past Sat or Sun the 10 or 11. We tried a lot of those nights. I have been extremely tired lately and worn down. On Tuesday the 13th, I was experiencing cramps as though I was going to be getting my period. Please give me some insight, because I really hope it works this time.