Taubah and Repentance

Q: I had complete relations many times with a boy without nikaah. Now I am so guilty I apologize to Allah. But what may I do that Allah forgive me and I become close to Allah. How is it possible? please help me.

Q: I am having thoughts about all the incorrect duas that I made. I have thoughts such as what if this is not a sin. Here are some examples: I said that I must only stare at Allah or worship Him or not get a certain bounty and maybe many more. So I do not know whether these are sins or not. So please tell me the mininum needed for forgiveness and how will I be forgiven? Please be direct and I want it all to be completely gone. And tell me the minimum needed to be completely and defnitly forgiven.

Q: How should I repent for the sins that I have committed throughout my life? Whatever I have done, the minutest of things things, a wrong word that I may have spoke?

Q: I am single with a 10 month old baby from a Pakistani. We live together but I don't want to get married because he is already married. I assisted him with his permit which allowed him to travel to Pakistan and he has now impregnated his wife. I asked him to leave as I no longer wish to be in a relationship and want to live my life as a pure Muslim woman. Is this wrong?

Q: I had another question that has been bothering me recently. I did my medical school in my native country. I am an old graduate of medical school and I have started PhD in public health in the US from this summer. It was possible to enrol into a PhD program because the university offered me a full scholarship for PhD. The only thing I regret is that for admission and scholarship to the university, I lied on my resume and personal statement that I was the best student in my class during medical school but the transcripts and recommendation letters submitted were completely authentic and the university also verified them by requesting a sealed official copy. So the lying was only on the resume and personal statement. But maybe it was overlooked by the university and they gave me admission and a full scholarship. After I enrolled myself in the PhD program, the Program Director has introduced me twice in various meetings that I was the best student from my country. Now I feel that my troubles are because I lied to get the admission and particularly the scholarship and that has now resulted in Allah giving me multiple problems in my career. I cannot inform the university about this or the Program Director who gave me admission and scholarship as I do not want to be labelled a liar but I want to know how do I repent for this sin to avoid any troubles because of this. The other issue is that I have circulated my CV to my advisor as well and other post-doctoral fellows with this lie and I would have to continue doing this for the next five years because I now cannot change it if they ask for my CV again. Kindly advise in light of Islamic teachings because my only intention was to get admission and a scholarship and was not to harm anyone by this.