Discipline and moderation in one's eating

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. 

Hadith Question

Q: Is there a hadith that was collected by Al-Bayhaqi in which the Prophet said: 'Say what is true, although it may be bitter and displeasing to people.'? If so, can you give the exact reference? And is the hadith authentic in its meaning?

Superstition

Q: We heard that Jinns do ibadat in masjid at night so don't go to masjid at mid night or a jinn possess you and many people were killed by jinns. Is it forbidden for going masjid at night or is this a superstition?

Manzil

Q: Is it permissible to read Manzil dua in Islam and how far is it authentic. This dua is uploaded in Youtube from reciters like Mishary  Raashid, Abdur Rahman Sudaisi etc. Different people have different views regarding this manzil as these are verses picked up from quran. Please direct me correctly. I am confused. Help me. 

Wazifa for residency papers

Q: I live in UK illegally for 8 years and I have applied to legalise my stay in UK about 5 years ago and until now I haven't got my stay. I don't have job for 2 months. It's been very difficult for me cope with every thing. Please tell me some wazifa for my problems.