help😭

So I had sex about two weeks ago. He came on the lips of my vagina and I used a vibrator to finish myself after that. I think I got sperm on the vibrator while I was going after it. 
I threw up and have been sooo nauseous. I've been craving really odd things and something's that I used to love, I hate. I've been in a really weird mood and sometimes I just get really mad at stupid things. And I pee ALL the time. I am a smoker and I can barely smoke without gagging and I'm at the point of just quitting. 
I've taken two pregnancy tests. One on Monday morning and one this morning. They both have been nagative. 
I'm really not worried about it if I am pregnant. I would be more excited than scared. So I know it's not stress making it say negative. Could it be a phantom pregnancy? What do I do?