What are the Sunnahs of fasting?.

I am currently living in Canada for the purpose of study, but my permanent place of residence is between Jeddah and Amman. When I stayed in Amman during the summer break, I decided to go to Jeddah to deal with some official papers, and I intended to do ‘umrah if Allah made that possible for me and if I had a mahram and enough time to do ‘umrah. I intended to do ‘umrah from Jeddah because my mahram would be there. But because I was not certain that I would be able to do ‘umrah, on the day I travelled by plane I did not do ghusl, because I was menstruating and I had not yet decided to do ‘umrah. When I got there on the second day I did ghusl and formed the intention to do ‘umrah from Jeddah, and I did it.
My questions are:
Is my ihram from the miqaat of Jeddah considered valid or not?  Because of my family circumstances, we are always moving back and forth between Jeddah and Amman, and we always enter ihram from our house in Jeddah, even if we are on our way back from a trip to Amman and after staying in Jeddah for several days. We do not remember how many times we have done ‘umrah in this manner.
What is required of us if we should have entered ihram from the miqaat for the people of ash-Shaam (Greater Syria)? After I did ‘umrah I was uncertain as to whether I was completely clean following my period. If I think it most likely that I was still menstruating whilst I was doing ‘umrah, what is the ruling on my ‘umrah and what expiation do I have to offer?.

A Muslim woman swore that she would not speak to another Muslim woman because of a dispute that had arisen between them. Then the other woman sent her several text messages, repeatedly, so the first woman responded by a text message. Now the first woman is asking: do I have to offer expiation for breaking an oath or not? What should I do if I want to talk to her again?.

My question deals with a friend of mine who was ignorantly joking. When my friend was teased by another friend he ignorantly picked up his phone out of joking and said I have to tell Allah. Then he said on the phone "Hello, Allah" as to tell Allah. I know this is incorrect but is this shirk?

I would like to know the proper way to make du’aa’ during prayer, as the Prophet (peace and blessings of Allaah be upon him) did it. Is it after the prayer or between the two prostrations or whilst standing or when?.

What is sincerity, and what are the benefits of sincerity?

Is it permissible to eat food that is distributed on the birthday of the Prophet Muhammad (peace and blessings of Allaah be upon him)? Some people quote as evidence the idea that because Abu Lahb set free a slave woman on the birthday of the Prophet (peace and blessings of Allaah be upon him), Allaah reduced the torment for him on that day.

I want to make my children keen to pray, because they will pray once then forget about prayer many times. I always advise them and pray to Allah to guide them. How can I encourage them and make them love prayer?.

Is it allowed to open unnecessary talk after prayer's Iqamat before the Imam begins to pray?

I want to know about ‘Umrah in detail.