wet dream

Q: I am a 22 years old male. I am getting white fluid discharge frequently from my penis without any sexual arousal and without any erection. But when I am sexually aroused I get sticky colorless fluid discharge. For the past five months, I do ghusal almost every morning because of this white fluid discharge thinking that it may be mani (semen) to be on safer side. It becomes difficult for me to pray Fajr on time. I am very much depressed. Doctor found no problem with me. It is not thick as mani. I don't know whether sperm is present in this white fluid discharge. When I am awake I wash private parts and do wudu. But my question arises only after sleeping everytime. My question is:

1) Do I have to do ghusl every time when I get this white fluid discharge when sleeping? (90% of the days I don't remember having erotic dreams) 2) Is this mazi or mani? (semen)?

Note: This white fluid comes even when I am not sexually aroused. It comes not more than 2 or 3 drops every time.

Q:

1. If I see a wet dream and I am wearing a pad, does it make the bed sheet najis if there are no signs of impurity on it? Should I change the bedsheet

2. I keep my scarf for prayer on the same bed. Has it become najis?

3. If I put clean wet or dry clothes on the same bedsheet, will they become impure?

Q: If I sleep only 2 or 3 minutes and I have a wet dream in this short nap but I am sure and totally aware that I had no orgasm and also don't feel any sensation at private area but released mazi not mani, so ghusl is fardh?

Q: If l remember a wet dream and find wetness but wetness is not mani or mazi but this wetness is vaginal discharge and sweat, so ghusal is compulsory?