Q: Can we hear nasheeds with duf (musical instrument)?

Q: I was offering namaaz when I heard some sound from my stomach. I am 90% sure it wasn't gas but as I am too much surrounded by waswasas I began to think I may have broken my wudhu but I continued with my namaz. My question is was my namaaz valid?

Q: I am 26 years old and have 5 elder sisters and a mother and no brothers. According to Islam can a women expose her breast in front of a mahram man and husband? During house-chores my mother and sisters expose their half breast and sometime full breast, this causes my private part to become erect and I have a discharge. I have no sexual desire with my mahrams but the beauty of the breast always make me have a discharge. My friend told me that this is not haraam or sin. You can easily discharge without any fear. Is this haraam or sin?

Q: When visiting a family to meet a potential girl for marriage, is it permissible for the girl and boy to sit in a separate room and speak about their plans, requirements etc, since it is embarrassing to speak in front of all the family members? There is a big window to the room so people in the adjacent room can see everything that is going on, but they can't hear.

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: In jamaat I had a wet dream and I was sleeping in the jamaat khaanah and I had nothing under me and when I had a wet dream I looked inside and there was fresh semen drops and also a patch of semen on my clothes and after I looked I laid back on my side again when this occurred I was laying on my back the while having a wet dream I slowly moved to my side then I checked and could see a big patch of semen. I was half asleep and I moved a bit more to my side. I don't know if the semen touched the carpet in the jamaat kanah. It's worrying me.

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: If a person has a disease such as HIV/AIDS and cannot afford the medication (1000$/month). Is it permissible to get insurance or use insurance benefits from work that one pays for in part?

Q: I am fond of eating food three times a day e.g. breakfast, lunch and dinner and in between these meals I eat some kind of snacks like sandwiches or samoosas etc and I am doing this for a very long time and it has become a habit. I feel shamed and regret for what I am doing but this thing has become so habitual that upon trying to quit I cannot, I can just control for one or two days and again I do the same. Is this a sinful Act? Please advise on this matter.