Doubts with regards to mani and mazi

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.

Wife involved in a haraam relationship

Q: Two years ago I got engaged to a girl and then I told her that if you want to live with me, you have to control yourself and don't do anything which affects our relation other wise if you do, I will do more bad and no sorry will be accepted then. She promised me that I will not do anything like that. But now after three months of my marriage I know that my wife was in a friendship with someone on the internet before marriage. Now I am confused what to do? I am not talking to her from 7 days. I want to know about my problem. What should I do according to the Islamic point of view?

Taqdeer

Q: There are many questions in my mind that are revolving and telling me that my Imaan is not complete.

1. Shaytaan is continuously saying to me that it doesn't matter what you do your Imaan is not complete because I am unable to understand the basics of Islam completely. One example is Al-qadar. I believe on everything Allah has revealed on our Prophet (Sallallahu Alayhi Wasallam) which includes taqdeer. But believing and understanding are two different things right ? Am I obliged to understand concept of taqdeer ?

2. Second thing that is worrying me is dispute of scholars. Like they have different very different opinions in some matters. One example is that if Prophet (Sallallahu Alayhi Wasallam) was light (noor) or bashar (human). Now I am really worried that if I believe one opinion of the scholar and what if the other one was right? I will be in great trouble on the day of judgment? Similar is the case with other issues in which scholars have dispute like some says taking waseela of prophet in dua is right and others say its wrong. Here I am worried as well that what if i accept one opinion and in reality the other was right ? I again will be ashamed on day of judgment ? Likewise, I am really confused that because of these scholars if i adopt a wrong aqeedah I will be punished and doomed on the day of judgment. I know that I should read Qur'an and Hadith to find the right path but again after reading Qur'an I do need to read tafseer to understand and there again different scholars take and interpret aayats in different manners. I am really really scared of Allah and His punishment. All scholars have different opinions and I am totally unable to recognize and choose the right one.