I took two pregnancy tests but still have early preganancy symptoms...could

[sarah_n_luv]

I still be pregnant? I had unprotected sex with my bf a little over a month ago. We did the pull out method and he did not ejaculate anywhere near my vagina. I took a pregnancy test a week later and it came back negative and I tried a week after that and it came back negative as well. I have been extremely nausea and excessively tired for the past few days. I don't have regular period nor to I ovulate regularly. Could I still be pregnant even after two negative tests. I took the last test about 2 weeks ago.