Tahaarat

Q: Because of medication, I experience retrograde ejaculation. When I reach an orgasm during sleep (due to a dream), nothing comes out, since the sperm is redirected to the urinary bladder and comes out later, with the urine. Does such a "wet dream" necessitate ghusl even though it isn't wet in my case?

Q: After urinating, very little urine leaks out, it's only a tiny drop of urine.  I don't notice when urine comes out, I cover and wrap my private part with tissue. When I check the tissue I see very little bit wet.

1. Can I pray more than 1 salah with 1 wudu for example pray zuhr and asr with 1 wudu?
2. I was told to do wudu for every prayer but it's difficult for me, I am not well.  If I pray more 1 salah with 1 wudu, would I be sinful?
3. I was told to ignore my urine problem, if I pay attention to it then shaytaan will hassle me so  shall I stop checking if a drop of urine came out or not?

Q: 

1. I am over conscious about purity and cleanliness. Even though I do my best to wear clean clothes, have clean body and wudu properly so I can offer salah perfectly but I always have doubt about cleanliness. I feel if I touch most things I'll get germs I have to repeat my wudu again. I can't able to do wudu any place anywhere I worry about cleanliness of the place. I have 3 different clothes, I wear 1 set of clothes for toliet, I have 1 set of clothes for going out and I have 1 set of clothes for praying salah.  I worry that if I wear same clothes that I went to toliet with that clothes wouldn't be clean for salah.  I wear sandals at home because I don't want to get germs or dirt from carpet.  I try to avoid touching the door handles so I don't want to get infected with germs. I get thoughts  place where I pray it's not clean enough. If some else prays on my praying mat (carpet) I feel that person made my mat dirty I have to wash it. I waste too much water and long time in wudu and ghusl. I follow the tiny things that are not even seen by eyes to clean them and remove them. After I do wudu I get thoughts like I didn't do wudu properly or I didn't wash 3 times each part of body or I have to repeat wudu again because I was bit careless when doing wudu.  These thoughts I get do I have to accept them or ignore them? I feel if I don't listen to these thoughts my prayer will not be valid?
2. How do keep yourself clean but not trying too hard or listening to shaytaan whispers?
3. I am pretty sure I am suffering waswasas with regards to cleanliness, how can I stop these thoughts?

Q: If the fat from pigs is chemically processed so as to produce two compounds, both different from the original fat, it would be considered as istihalah?

Q: When I made fard ghusl couple of days ago I can't remmember if my beard hairs got wet. If not I've got a flat beard what should I do?

Q: I have a problem for the last 5 years. In a week many times after urine sperm comes out with urine so I cannot continue my prayer. So tell me if I need gusul or not?

Q: If one watches porn and can feel semen about to come out then he turns it off and he cools down then goes for urination will ghusl be fard?

Q: What is istihaalah? Especialy regarding products from pig?

Q: 

1. The splashes of water when washing our private parts in istinja is paak or napaak?
2. The water which wets our feet due to movement of our hand in these situations is pure or impure?
3. Our hand with which we have cleaned those areas if it touches our clothes will the clothes be naapak?
4. Once this happened and where I thought that my clothes has touched my hand, I washed it with water and offered namaz and after some time I began to think that i washed the wrong place. Now I don't know was my namaaz valid?
5. When we wash our hands aftr istinja and the sleeves fall down and it gets wet, do we have to wash our sleeves or not? 

Q: When I went to the bathroom I felt a splash of water or urine on my hand, I don't remember now. I didn't see it that time. I thought I will wash there but when I stood up, my sleeves fell down and I don't know where it was. 

My question is, is my sleeve napaak in both cases if it was impure water or if it was urine or if I don't remember what it was?