-hpt 2days late and tons of symptoms

I am so frustrated right now. I am two going on three days of AF being late which is unusual. I have literally tested 1-2 times a day for 8 days and all tests are clearly negative. Not even a glimmer of a faint line. I know I ovulated between the 27-29 sometime. Last time we had sex was on the 29th so I feel like I should have a positive test by now. I'm having multiple symptoms (had right pelvic pain, headaches, nausea, slight fever, a runny/stuffy nose (I have no allergies), heartburn the other night, brown tinged CM etc.