Could I be pregnant?

Emma • Mom to a gorgeous little girl!
I am on the 15th day of my cycle and me and my boyfriend never use protection we always just use the pull out method (not smart I know!) but we have been having sex almost every day...
The past week or so I have been overly anxious and emotional, I am over a week away from my period and my moods don't usually change until days before, my vaginal discharge has changed and has a very strange odour that I haven't had before & I have been peeing 6/7 times a day (I normally go twice max!) but with no pain or anything & I haven't changed how much I am drinking... 
I am constantly having pregnancy scares but this is strange, any ideas?