Am I pregnant?

When my boyfriend visits me, we are very sexually active. When he was here it was the days of the 3/6. On these days we had multiple sessions and we used condoms but that’s after a little while and we never talk about it afterwards. Once, I thought it broke and I talked to him afterwards and he said it didn’t so I believed him but two weeks later I’m suddenly very tired, I have been very nauseous and I have been thirstier ( this has made me pee more, obviously ). I don’t know if I have the flu or what. I haven’t had a fever or anything. My period is in a week and I know I shouldn’t worry but I am still finding myself thinking about it. What do you guys think?