Am I pregnant? I'm freaking out in anticipation!?

I have little tummy pains, and while I try to switch my laundry the moving hurts my back. & I am sleeping all day everyday & I never feel awake & refreshed when I wake up. I'm a little sensitive to smell but I could be over thinking things. I'm 18 & I'm 130 lbs. I have a pregnancy test but I don't want to take it until the time is right. My last period was over a week ago & it was only three days when it's typically 5-7 days & it ended with spotting. HELP!!