I think I'm pregnant. I need advise

Alyssa
My boyfriend works out of town Monday - Friday. I started ovulating two Sunday's ago and was ovulating till Thursday or Friday. My boyfriend and I had sex several times over the weekend. So that's been 14-17 days ago. I am havin SO MANY symptoms of being pregnant but still am not getting a positive test. My boobs are swollenand hurt, back aches, stomach cramps and discomfort (not period cramps), nauseous, sense of smell is amplified, I am crying over crazy things and getting agervated easily. Plus more little things. I need advise,  this is driving me crazy!