Ghusal

Q: In fard ghusl under the shower is it possible for any hair to remain dry?

Q: Do you have to gargle in fard ghusl or can you just move water around in your mouth like in wuduh?

Q: If a person did not know the fardhs of ghusl for years and would just take a shower when needed ghusl, and he may have gargled mouth and blew nose in the shower but don't know 100%, will the salaah, saum etc of all these years have to be repeated?

Q: The underwear I had on I cant like really see any round patch on it so should I just consider my body paak and consider ghusl to not be fard?

Q: Okay I have a question.. and I really do need specific instructions/what to do; please do give a descriptive answer to clear my mind of any doubts.. 

[This is from what I can remember because it was a while ago] 

So the day before I believe I had a 'nocturnal emission' [wet dream] and purified myself. Then the night before I wore a pair of bottoms that I hadn't worn in a while. When I woke up I believe it was fajr time, [can't remember if I had a dream or not] entered the toilet and noticed whitish like tiny patches that were not concentrated in one spot [as it would be normally] nor was the surface of the bottoms to my knowledge 'crusty'. Also it was dry, not wet or damp.. I think the bottoms still smelt clean [Might of been washed before I wore it]. So after thinking about it to myself for a while. [I did have doubts before to do with wudoo' [waswaas etc. but rarely or never before with emissions] I changed, did wudoo' and thinking that it was stains/white specks from a while ago I prayed thinking that I was okay and not in need of wudoo'.. I did have doubts though and later, [after fajr I believe] had a shower [just a normal shower I believe] Now I really don't know and I am confused.. It I was definitely sure I needed ghusl I would repeat the salah... but I just don't know and I am worried about what to do... Please help me

Q: If one was nepak, had relations and did not make ghusal yet, is he allowed to make zikr?

Q: For the past few days I haven't had a wet dream the tip has been damp or dry in the morning there is no liquid inside (semen). I don't know if I had a wet dream in the past week.

Q: 

1. I soaped my body and under private parts and arm pits twice so is my ghusl done and I forgot to put water in the belly button and in the ears so I went back in and put water in the ears and belly button. Is my ghusl done?
2. I was laying down and my legs were closed together and I could feel jerks like a few but not like the ones when semen comes out so would I need to do ​ghusl in the Mornning? There was no liquid and the tip was dry.
3. While I was reading fajr I felt a strain in the penis but I don't know if anything came out

Q: I soaped my whole body and rinsed. Is my fard ghusl done?

Q: I am suffering from so much waswasas. I can't handle it I think I am always napaak. When I perform ghusl after I think I having done it right I don't know if all the hairs have got wet on the body. Could you explain to me a way that you would do it so every hair on the body gets wet so the ghusl counts because I think all my salaahs are not getting counted as well and this is really getting to me. It's on my head 24 hours a day I keep having a shower like 3/2 times a day because I think every time I do ghusl its not correct. I need your help