Worried. Possibly pregnant?

So I had sex with my boyfriend about a month ago.. we didn't use anything which was stupid and risky. He pulled out every time and I didn't think anything of it. My period had just ended then.. two weeks later we had sex again and he came inside me. The next day I took plan b and my period was supposed to come in three days according to the tracker. It was four days late... lasted about 3 days and was on and off heavy, accompanied with awful cramps. Now is been two weeks since we had sex and I'm super nauseous, dizzy all the time and I'm so bloated... could I be pregnant and is it too early to take a test??