HELP ADVICE NEEDED

Katie
So my Husband and I have a really bad habit of taking that every month is going to be the month that i miss my period and get the news that we are pregnant. This month in particular we feel that we are because of a few things: 
1.) For the past 5 days I have had HORRIBLE lower back pain. Can not get comfortable or walk normal. And I did NOTHING to hurt it, or tweek it. 
2.) Wednesday/Thursday I had an odd vibration almost felt like little spasms in my lower belly. 
I just wanted to ask if I am crazy to think that this month is any different than the past 7 months???