Thoughts ladies??

So I just got off my period like two weeks ago me and my boyfriend have been having unprotected sex for about 3 years now lol and he always pulls out and lately I’ve been felling a bit off I’m having back aches slight cramping and I threw up two days ago after I drank cranberry juice (a brand I never tried before) but other than that I love cranberry juice, after my period was over I saw light blood and it made me wonder why but I never thought anything of it .... could I be pregnant? I don’t wanna over exaggerate and get a pregnancy test.