Leaving one's ill father in law to perform hajj

Q: My father in law is very ill since the past 6 months. We have a joint family system where my mother in law, sister in law, brother in law, his wife and kids all live together. I, along with my husband want to go for Hajj this year. Is it permissible for us to go? Or should we delay our plans of performing this life time obligation keeping in view the condition of my father in law?

Taqdeer

Q: If everything is in Allah's hand why the term test is used? Isn't it written in my taqdir? Is anything which Allah has left on our hands? Aren't our good and bad deeds the earning of our hands?

Verification of a Hadith

Q: I recently heard a hadith that the infants and the people to whom the mesage was not sent will be tested on the last day with the commands of a messenger who will tell them to enter hell. People who will enter hell will be successful. But there is another hadith that infants will not enter jannah without taking their parents with them and they will enter jannah. Don't these two hadiths contradict? Is the first hadith authentic? If not what will happen to people whom the message is not reached in this world?

Is it necessary to change clean bed sheets and scarves after haidh?

Q: I have heard that after the haidh is completed, a person may no longer sleep on the same bedsheets, even though the sheets are not messed. The sheets must be changed before making ghusl or if ghusl is taken and the sheets have not been changed, one may not sleep on the bed unless the sheet is removed. Also further this was applied to any scarves or burkas that one may have worn during the haidh for even a short period. Is this correct?

Uncle touching niece with lust

Q: I have a question regarding the validity of my friends nikah. My friends uncle touched my friend with lust when she was almost 10 or 12 years old. Afterwards he didnt do such things with her. At the time of nikah, my freind chose her uncle as the wali or as we say, the wakeel of the nikah from her side. Now she has four children and she is worried if her nikah is valid or not.