Pregnant?

So I visited my boyfriend for the weekend while he had Liberty and we had unprotected sex probably 6 times and he busted in me each time. I'm not on birth control either and  It's only been 3 days but day 2 I felt so weak and sick on and off and today driving home was horrible. 11 hours driving and I was so tired and I've been feeling like throwing up. I don't even really have a big appetite and I have a bad headache... Could I be pregnant and getting early symptoms within 2-3 days ??? 🙈😨 help please