Fasting is obligatory, and not fasting is a great sin.
The only people exempted from fasting are the following:
Travelers (of long distances)
Sick people (that are too sick to fast)
Old people (that cannot fast)
Those undergoing menstruation or something similar.
The point of Ramadan is not that Muslims stop working. They need to work anyway. Fearing ...
If you intentionally ejaculate, yes it will break your fast.
I don’t understand why you’d want to do such a thing since you won’t even end up feeling any pleasure?
And I’m not too sure if it’s possible to intentionally make yourself have a wet dream.
Fast on the day of Exam
The most simplest answer would be You are already on a Exam , The Exam of your life. The life that you're living is Temporary and the life you'll live in your afterlife either Heaven or Hell, depends on the result of this exam! (al quran)
Now you decide, which on you'd choose, the simplest question.
And about "Ramadan", this ...
According to this fatwa you can take necessary medecine during fast.
According to this fatwa, you cannot fast.
You should read this longer fatwa respecting medical issues.
Saying «Alternative routes of drug administration can help fasting patients», it implicitly allows taking medicine during fast, and recommends to consult the doctor to councel whether ...