Factors that break wudhu

Leaking of Pre-Coital Fluid

Q: I have a problem of leaking of pre-coital fluid. This is not regular occurrence i.e. sometimes it happens and sometimes not. Sometimes I feel that there is something, but when I check, there's nothing. I usually check after I perform Salaah. If I was not aware that it has happened and find a stain on my underwear after Salaah, should I repeat my Salaah? 

Mazi

Q: When checking for mazi if I check on my underwear and on top of the private part for mazi or traces of it and find nothing, but when squeezing the private part then only seeing mazi come out after squeezing, is the wudhu broken from before? Or only when  mazi actually flows out after squeezing? No traces could be seen on the private part head or the undergarment. So will wudhu be broken if mazi is there(inside) but didn't flow out?

Experiencing a Discharge Continuously

Q: I have had a vaginal discharge that is whitish yellowish/cream in colour. This discharge has been for years. After the birth of my child it is still there. It is very uncomfortable since my underwear gets stained and I just feel napaak. The gynaecologist says that it is normal... But I don't know whether I am paak or not. I have been changing before each namaaz or when I feel the discharge and the salah time set. This is very difficult especially when going out. I will be going for umrah inshallah. PLEASE advise me what I should do since to make whudhu and change at every salaah is very difficult in the haram. PLEASE advise.

Urge to Break Wind in Salaah

Q: I was performing salaah and during my last sajdah I felt accumulated wind about to come out i.e. I had the urge to break wind, when I sat back from sajdah that feeling was gone. Now I don't know whether the accumulated wind came out without me noticing it, or that the accumulated wind just disappeared into my body. In such case is my wudhu nullified? Can the feeling of accumulated wind just disappear (without coming out) back into the body? Or must I regard it as having come out even if I did not feel something coming out? Should I repeat the prayer and the prayer I have prayed after it?