Question for you ladies

So I haven't gotten my period and my last one was September 15th. My boyfriend and I have been BD'ing a whole lot this month.. I've been extremely car sick, even if it's a 10  minute car ride, I get nauseous. They only way I won't puke is if I have the cold air blasting in my face, and now I can't sit with my legs up like I always do? Also I get suuuuuper hungry, my boyfriend said he's never seen me eat so much 😂 I've taken one test and it was bfn but I think I took it too early. Do you guys think I could be pregnant or should I go see a doctor?