Factors that break ghusal

Q: I performed my fajr salaah with jammat. After I returned home, I went to take a quick shower before going to university. Last night I can't remember if I saw any thing or ejaculating at night but in the morning while washing between my leg and private organ they was kind of a fluff dirt not on my private they was nothing there. After I smelled my underwear, there was a little smell. Don't know if it was sperm but no sign at all of any najaasat. I just changed my life a week ago after committing a few major sins. By this happening it will make me stop my ibaadat and worship of Allah. I am not sure of what to do. My bedding is not messed. I started my missed salaahs. What do I do?

Q: If a person has sexual thoughts in his dream but upon waking up cannot see any form of impurity nor feel any kind of wetness nor does he with certainty remember ejaculating whilst asleep, would this mean that the person does not need to do a ghusl and that he is still in a 'paak' state?

Q: Do you have to shower after masturbating?

Q: Should I make ghusal again if I not knowing wore clothes on which semen was discharged?

Q: I was sitting and doing nothing. I didn't have any sexual thoughts but some discharge came out. I went to the bathroom and urinated and then I washed 3-4 times. My question is that am I napak because the discharge came out. I wasn't thinking about anything bad? I have been having doubts. If I did become napak but got my periods but I took a shower, will the napaaki leave or will I be napaak and if I sit and use things will they become napak?

Q:

1) Do you need to do ghusal after you shave your armpits?

2) Do you need to do ghusal after you shave hair on your private parts?

Q: If I am not sure if I am napaak and have to do ghusal or not and prayed salaah, will I be severely punished? If I use my blankets and bed will it become napaak?

Q: Could you please advise if a female must have a ghusal bath after a pap smear or cervical medical procedures?

Q: In medical school you have to take anatomy class and dissect cadavers (dead bodies) for educational purposes of course. The cadavers are non-Muslim as far as I know but you wear gloves and lab coat while dissecting.

1) Do you have to do ghusal every time you have that class because you dissected the cadaver or is wudhu sufficient to do wudhu to pray namaz?

2) If you have more classes after that and you just wash your hands do you have to read anything while washing them?

Q: If you could please give some guidance on the situation it would help a lot. I have heard that females only need to do ghusal when they have an orgasm or wet dream. I am a very doubtful person and 1) sometimes when I am sitting I will feel some tingling once or twice but I don't feel an orgasm, do I need to perform ghusal? 2) This happens allot and causes me lots of stress. When I go to sleep I will see a dream and feel tingling but don't feel or remember feeling an orgasm, do I have to make ghussl? I get vaginal discharge all the time so its very hard for me to check if there is extra wetness. Please give some advice.