Is it possible I'm pregnant? Negative test but period is a week late?

My bf and I are both 25 and we've been together for 2 years. We arent TTC but we dont use protection and we have sex fairly regularly. I didnt keep track of which days we had sex unfortunately, I know we had sex several times between June 5th and June 11th and atleast once between the 11th and the 17th. I had my period as usual on May 24th, my cycles are 33 days apart usually give or take a few days. I should have started around June 26th. I still have not started. I took a pregnancy test (FRER) yesterday morning and it was negative. My breasts are extremely sore and have been for days, CM (sorry if TMI) comes daily and its white and thick but not sticky and no smell, I have a tight feeling in my uterus area, headaches, extreme thirst, and am very tired all the time. I just dont feel normal at all. Id be really happy if I was pregnant but at this point I just want to know whats going on and why I havent started my period. Im planning on taking the second HPT in a few days. Ive heard stories about women not getting positive HPTs but actually being pregnant so I just want to know if that has happened to any of you or someone you know?