Not wishing to listen to the Quraan before an exam

Q: Is it sinful to not want to listen to the Quran right before an exam because you fear that listening to it might cause you to forget some of the stuff you are trying to memorize for the exam? Would it take one outside of Islam to think that the Quran could cause any sort of harm? Obviously, harm can only occur with the permission of Allah, but I mean thinking that the reason for the harm could be the Quran?

Hijaab

Q: I wore hijab two years ago and now I really want to take it off. I have been waiting for few months for that feeling to change and it's not changing. I pray and I read Quran but the environment is not helping me. A lot of people are mistreating me because of it and I feel people treat me through the hijab not for who I am. I have been searching a lot to understand why I must wear it but nothing convinced me. 

Making masah over a gauze

Q: For the reason of taking medication through drip, I have a covering on my arm just below the elbow. This is a plastic tap held by gauze and cannot be removed for at least two days. Is wiping with a wet hand on top of the gauze when performing wudhu correct?

Communicating with the boy before nikaah

Q: I am in a very discomforting situation in my life. I don't know who to ask but I think Allah SWT guided me to you. In my family, only my mum does Shariah Pardha. In my Dad's side of the family, it is a norm to get married in the family as well as to talk to your cousins.

A while ago I communicated with my male cousins but I realised it is wrong. Therefore when I went back home I only spoke to them if there was a dire need. I don't do Shariah Pardha at the moment but I hope to do so.

Anyhow, I got engaged to my uncle's son whom attends jamaats etc. He tried to communicate but I ignored the messages. Later he spoke to my female cousins, therefore I responded and explained that I don't find it appropriate talking to you. But he doesn't understand.

My parents think it's okay for me to talk to him if I talk within limits. However, I don't want to talk to him and I have explained a couple of times, however he does not understand. I don't know what I should do.