I Had Sex Right After I Got Off Of My

I had sex right after I got off of my period last around the 16th or so of September. The condom broke so I took plan b. We have also had unprotected sex many times after that using the "pull out" method. I still have not received my period, which is typically regular. I have been experiencing symptoms such as: extreme tiredness, food aversions, increased appetite, inhanced smell, frequent urination, being more thirsty, dizziness, mood swings, increased shedding and dry skin. I have also noticed that I look kind of bloated but it doesn't go away and I feel like I've gained weight which I never do. But I have taken 2 at home pregnancy tests and both were negative. Could I still be pregnant?