Nikaah & Marriage Issues

Q: My question is my boyfriend proposed for me and I said yes to him by text. He showed it to two baaligh aaqil azaad men. Did our nikaah get valid or invalid?

Q: Is my father a mahram for my wife?

Q: I have been married twice before and have three children. I am living back with my parents (mom and brother) since earlier this year, but work and see to the kids for everything excluding rent to stay. I am having a hard time coping financially. I would like to remarry but my brother (my father has passed on some years ago) thinks it is too soon and will not meet the man that has put the proposal forward. My question is do I need consent from my brother and or mother?

Q: I got a proposal from my aunty (she lives in America) for her step-son. But the problem is he does not follow Islam. He is an atheist. He does not believe in any religion. My parents and my aunt are telling me that if Allah wills, he will accept Islam in the future (after marriage). My question is can I marry him, is it halaal?

Q: I performed nikaah few days back but after some days the witness told my husband that he didn't listen to the nikaah ceremony properly and didn't listen when I said "yes" for the nikaah. He said that during nikaah his mind was deviated from the ceremony and in short he didn't listen to our nikaah and my acceptance. He then advised my husband that he should perform nikaah with me again. So I just want to say that was that nikaah valid or not because the witness denied that he listened to the nikaah.

Q: A boy is getting married. Although he is not wealthy, he pays zakaat. Does he pay mahr-e-faatimi or the minimum mahr?

Q: I keep making oaths and I am worried they will affect if I am allowed to marry my fiance or not. I made an oath that if I marry him then my marriage is not valid. Does this mean I am still married? Please help me I really want to marry him and I am scared that I wont be able to marry him because or these oaths.

Q: What are the least possible requirements of doing nikaah? Is it possible in the presence of only two witnesses and bride and groom? Or the presence of a Molvi is necessary?

Q: My brother had nikah in a situation where his mother in-law was suffering from cancer and passed away one week before marriage so he had no walima done. Now after Ramdhaan my mother got seriously ill and had to opt for lumbar spine. She has to be in bed for at least three months. We are three siblings, two sisters and brother. Both sisters also married. Is it allowed for my brother to bring his wife without walima to look after my mother?