I have always been cautious of my surroundings and staying 100% healthy. But,I do have some concerns. I have 4 situations that are bothering me badly. 1st- Back in 7th grade, I received a pair of earrings from my friend. Being a pree-teen, I did not think to sanitize them before wearing them. How common is it for people too contract hiv or other infectious diseases from sharing earrings? 2nd-I was in my room making up my bed and all of the sudden I felt a scratch on my leg and I immediately panicked. I looked at my leg and noticed a scratch. I do not have any needles of any sort in my room, but my sister was in my room and she may have planted something near my bed so it can purposely scratch me. She then left the room shortly after and I can't help to think that maybe she planted something in my room to harm me. I ask her and she said no and I was just being paranoid like always. But, I wouldn't put anything past her. I haven't known her to have an needles of any kind, but you never know what people are capable of these days. My question is, If it was needle that scratched me, could a contract a disease that way? Would I have known if a needle scratched or poked me? I looked at my leg and only saw a scratch, it wasn't a scratch, but I have brown skin and where I felt something, it made my skin become ashed. I put alcohol all over my leg to see if I had a burning sensation, but I didn't. But, now I leg does feels like it has a burning sensation. Is that all in my head? If I go to the hospital, would they administer PEP injections to stop be from contracting any diseases? 3rd- I was at school and I was admiring my classmates jacket and I asked how deep did the pockets go and she told me to feel for myself. I asked her was anything in there before I put my hand in there and she assured me nothing was in there. So, i stuck my hand inside her pocket, but I felt something. It was gum wrapper and a penny, I believe. I looked at my hand and I had some golden shimmery stuff on my hand. This same classmate, had told me earlier that some people were out to get her because she got them fired. she also told me that they have been putting metal shavings all threw her house, her clothing, and etc. The metal shavings are effecting her health. (she caught them on survelience entering her house). If they will go to extremes to do that, I wonder what else they were capable of of. So, if they had put a needle/suringe in her jacket, I would have felt it, if it poked me correct? 4th- how common is it to get hiv or any other infectious disease by French kissing/ open mouth kissing?