My Periods 3 Days Late. I've Got A Tenderish Chest

My periods 3 days late. I've got a tenderish chest area, headaches and I've been moody. I've had a little bit of clear thick discharge and I've been tired but I'm not sure if its because I've been up late alot recently. I only had protected sex a few times in the past month but I'm not sure if the condom broke here or there without me noticing. Am I pregnant?