Urine drops problem

Q: I have always suffered from the disease of urinary dribbling, but recently it has become aggravated and I have fallen into the category of ma'adhur (one with a chronic excuse). My question is a two-part question related to my current situation:

1) A few weeks ago I was praying Isha (and some other prayers along with it). Unfortunately I was also in a state of sexual excitement at the time (no erection, but just a feeling of excitement). During my prayer I felt some najasat exiting my penis several times, but since I was already ma'adhur, I continued praying. My concern is that the najasat was prostatic fluid, and the prayers became invalid.

2) On another occasion I was standing in prayer and I got this sudden urge to urinate (which was not there at the time I started Salah), and I was trying to suppress the urge and the pressure, but some urine did exit at the time. However, within less than a minute the urge just disappeared, and I continued praying (and prayed several other prayers too) with that wudhu. Does this situation also fall within the realm of my normal udhur or should I have stopped my prayer and repeated my wudhu?

Attending a Christmas party

Q: I am an international student from Pakistan living and studying in Canberra, Australia. I am renting a room in a shared house with other students. My landlord has arranged a party on the occasion of Christmas today inviting all the tennants who follow different religions. I as a Muslim, can attend this party / get together? I understand the fact that wishing someone Christmas is doing shirk.

The Sunnah method of Istikhara

Q: I want to know that is there any other way of doing istikhara (accurate and fast). Someone told my mum that take a bowl with water and write the decision on the paper and let it float on the water and the direction will determine the answer. But I am not sure and forgot the way. So please guide me in the light of Islam.

Sunnah method of making istikhara

Q: I have received a proposal and read Istikhara for which I received a positive reply. On Saturday a lady came to my house who "sees" and asked if she could "see" for me. I thought it was like going to a Moulana where they check to see if any nazar or jaadu is troubling you. She told me a lot of things about my future. She also said that my Istikhara even though it was positive, if I married the man it would be the biggest mistake of my life. She is a Muslim and made me read durood sharif and blow in a glass of water before taking the glass and "seeing". I have always been under the impression that Istikhara is guidance from Allah and that only Allah can know what our future holds. I am very confused. Please advise if what this woman does is accepted in Islam? Is my Istikhara still valid. Would it be best to get an Aalim to read istikhara on my behalf? I am very confused.