Doubting whether wetness is mani or discharge when waking up

Q: I got up and noticed wetness but as I was having this kind of discharge most of the time nowadays and before sleeping there was some discharge, so I didn't do fard ghusl and read fajr and recite Quran. But I was feeling like I was sinning as the amount of discharge was not this much before sleeping and on the other hand it was like normal discharge which I was experiencing normally. Now is my salah valid or not?

Semen retention

Q: Is semen retention (meaning after going to wife and not releasing semen) permissible? This is a meditative art to control the mind and body. I want to ask you that if I do not release semen or sperm after intercourse for 4 to 8 days? I don't do this for birth control but just for maintaining energy in my body. Is it permissible to do so?

Celebrating the birthday of Nabi (sallallahu alaihi wasallam)

Q:

1. According to the hadith, immitation of kuffar is haram. So if I eat a birthday chocolate someone gave me and went away, is it harasm? Because its a non-Muslim practice to celebrate birthdays.

E.g. If I got a chocolate on someone's birthday and I kept it and after 2 days I ate it, is it haraam because that chocolate was purchased for a haraam act which is celebrating a birthday which itself is immitation of kuffar?

2. Ruling regarding celebrating Nabi Muhammad's (sallallahu alaihi wasallam) birthday. Is it imitation of Christians, because they celebrate Christmas like Isa (alaihis salaam) birthday?

3. If a Quran is printed in an industry, like from softcopy to hardcopy, then is it man made or Allah made it? I mean if everything Allah created then what about the above case where hard copy of Quran was made by using a machine. Is it then machine made? Also if a man writes whole Qur'an, just as one photocopies, was the Quran made by a human because a human was the one who took ink and paper and wrote the Quran and compiled it or Allah made it?

Celebrations in Islam

Q: In Islam there are only two celebrations, namely Eid al-Fitr and Eid al-Adha; anything other than these two celebrations is an innovated festival or occasion and it is not permissible to celebrate it or to help others to do so. Is this ruling correct? I got this from website.

Also is celebrating birthday not allowed due to this if so?