Q: What should I do if I pray 3 rakaats instead of 4 rakaats mistakenly?

Q: The moisture left on my lips from washing my face/mouth during wudu, is this safe to be licked and ingested when fasting? Usually after I wiped my lips in wudu, I have to spit and then let my lips air dry and/or wipe with a tissue until dry. Today after wudu, the majority of my lips were dry but in the corner of my lips I felt a coolness, which may indicate that there is still moisture from wudu left. I licked that area. So now I’m just wondering if my fast is valid. 

Q: I want to know if is a myth or real in Islam that a when a girl has her first period she should get married as soon as possible.

Q: If Fajr time expires at 7:08am and I finished my salah at 7:08 am, is my salah valid or I have to offer qadha for it?

Q: Is it permissible to wear gold plated watches? Meaning, the whole watch is gold plated with real gold.

Q: I have a Quran cover which is permanently attached to my Quran (it can be removed, but I never remove it unless I wash it) can I hold this Quran of mine when I do not have wudhu?

Q: I want to know about urdu word "nazar e muyyan", people sacrifice animals if they are ill, or calamity stricken and want to get out of difficulties.

Note: This is done without any commitment. There is another type of commitment that if I succeed I will spend such and such on the poor. I am asking about the 1st type. Does it have any relavance. If that is true, can I spend money because I cannot sacrifice an animal because of living in a foreign place?   

Q: People work hard to earn more money and make their duniya good, is the wife included in duniya or not? 

Q: When we recite any dua then we say aameen or if someone gives us duas, e.g. he says "Allah save you from hell" then we say aameen. One of my brother says aameen and also adds "aameen bijaahi nabiyil kareem sallallahu alaihi wasallam". Is it correct? Can we add or subtract according to our own thoughts. 

Q: Someone sent me a link and said that Nabi (sallallahu alaihi wasallam) celebrated his birthday because of what is stated in the link. Could you please calrify and tell us a way to explain to them why we cant celebrate Rabi ul awwal?

Did Nabi (sallallahu alaihi wasallam) fast on Mondays due to the fact that he (sallalallhu alaihi wasallam) was born on a Monday?