Satan has given bad thoughts please help. Serious answers?

Yesterday, for science class I had to look up cleavage and fracture. I looked them up seperately. When I looked up cleavage this gay porn site came up. It didn't bother me that night but today I started thinking about it. I was like does this make me gay? I finally told my mom. (we are christians) and she told me no that I'm not gay cause It came up. Satan has been telling me that I liked it and I've been telling myself no that's not true. He's also been telling me that I am gay. I don't wanna believe it. I haven't been able to get erection to girls but I think it's because I'm really worried. I've been telling myself I'm not gay and me and my mom prayed. My mom said that it's an attack from satan. Could you please just say what you think and pray for me. Thanks