Is there still hope?

I have been feeling tired, bloated, emotional, weird cramps that come and go randomly, headaches, slight cravings, I got a cold 3 days after we had sex during ovulation, been stuffy ever since, and AF is 4 days late. I have never been late my entire life. However, I keep testing negative! I am not stressed out any more than usual...I really don't understand what's going on. Am I pregnant or not?! No doctors appt available for 2 more weeks. What should I do?! Not knowing is so frustrating.