Scared to death

Okay so about 2 months ago, I began to get this white scratch on the inside of my cheek. I thought it was a canker sore but it's not an oval it's a straight line that lines up with my teeth. I still have it. Just after about 5 days that I had it, I looked it up on the internet and I thought it was a canker sore and completely harmless, so I performed oral sex on my boyfriend. Now it's about 2 months later and not only has it not gone away, it's grown bigger and reaches to the back of my throat. I am still able to swollaw, I've had a few headaches and I had dark brown discharge right before I had my last period, It has gone away.

I feel scared because I am only 15 and I haven't told my mom what I did even though I really want to I'm afraid of getting in trouble, and I don't want him to get in trouble either.

I have also started to develop a bump on the side of my tounge it's pink but I noticed it's also a little gray spot on it. Ever since then I've been washing my hands more to make sure it's not germs and I've been brushing my teeth because I admit I haven't been totally clean and taking care of my self lately. I just really hope it's not an Std or something that can last a lifetime..I have a doctors appointment today and I really hope it goes well. Please help me understand what these 2 things are and please pray for me.