Thank you very much for your corrections. Here are the sentences I tried to reword.
1) Hamlet considers the reasons which may lead us to take our own life. He thinks of the punishments and insults which people who are good and quiet take from those who are unworthy.
2) In particular, he refers to political oppression,social discrimination, unreturned love, the delays of justice,insolence and ingratitude.
3) I think you should use a paracetamol suppository every eight hours and stay in bed (rest?) until the doctor comes.