I'm 13 am I gay? I'm so confused?

Well this might be long but here goes. I have always liked girls until I pictured in my mind kissing another man. I got an erection. I told my mom and she said it could just be puberty hormones. So then I had a dream that I was at a pool with no women only men in speedos. I woke up and my bed was wet so I went into the bathroom and turned on the light. The liquid was white! So am I gay or just bi-curios