Doubts regarding purity

Q: There was a time few years ago when, due to OCD, I would remain in a napaak state, na'oodhoobillah. One day my father insisted that I should make Wudhu and perform Salah as Shaytaan was playing with me.I did not want to perform Wudhu because I felt that my feet were napaak and therefore if I washed my feet and wore the slippers that my parents use & then walked in the room in which they perform Salah with wet feet, the carpet in that room would become napaak. I however had no choice but to do so.

Purchasing a house on mortgage

Q: About buying a house in the UK on interest (sood) mortgage. One mortgage is standard and one is Islamic. In stranded the bank will show you how much interest you will pay and in Islamic the bank will show you how much rent you will pay. But many people and Ulama say that Islamic mortgage is also same as standard mortgage. Because you want to buy house that you don’t want to pay rent to council or to the owner then why should you pay it to Islamic mortgage and one of my friends has spoken to a mortgage adviser about both mortgages and he said that both mortgages are the same, the only difference is in the name.

Hafiza leading other women in Salaah

Q: In beheshti zewar it is mentioned that for a lady to be the Imam with another lady muqtadi is makrooh-e-tahrimi. A hafiza wants to make her Khatam in taraweeh Salaah in Ramadan, but her dohr is not strong and she needs someone to correct her mistakes. Will it still be makrooh for her sibling to read with her and correct her mistakes?