Had Unprotected Sex, Have Symptoms Of Pregnancy, Swollen Breast, Itchy, Sick, Acne Breakout, Test Turned Negative. Help?

Hello, so about 5 weeks ago my boyfriend came hom from the air force, I messed up on my birth control so i was spotting the entire time he was he But we still had unprotected sex because it wasn't to bad or an issue. while he was here i experienced lower cramping pain like I was ovulating, and then that went away and we had sex again a night before he left. the very last time we had sex was 3 weeks ago today and ever since then iv had symptoms of pregnancy mine have been swollen breasts, itchy discomfort down below, feeling sick, natious, peeing very frequently,acne breakout,and minor mood swings and others.. but tests i've taken have just turned out to be negative.. is it to early to tell? what should I do? wait to take another? Help please