Thoughts of showing off

Q: If you get thoughts, urges or daydream about showing off your worship to other people so they will praise you but you don't act on the thoughts or urges, would you be still a sinful? Basically they are just thoughts, desires and urges of showing off in your heart but you don't physically show off.

If you get thoughts or daydream or images in your mind of shirk and kufr but never act on them physically, they are just in your mind, would you come out of Islam or become a disbeliever? 

Mazoor making tayammum

Q: I have some health issues and I have to renew wudhu before a salah starts because I am a mazoor or excused person (urine comes out). Can I do tayammun instead of wudhu? Because it takes me 10 minutes to do wudhu and I am not well plus if I wash my body parts too much they get dry. 

Female dentist treating male patients

Q: What is the ruling for a lady who is a dentist. While treating her male na-mahram patients, she have to touch their mouth area to do the required cleaning and surgery operations. She wears gloves during the entire operation or cleaning procedure.

Also, there are many male dentist doctors availabe in our city. Is it still halaal for her to practise dentistry and treat na-mahram male patients? What is the Islamic ruling on this?

Cleaning urine

Q:

1. I was in my mother's house and my son urinated on my mom. My mum dried the urine with a tissue and mopped the area once. Then she washed my son just by wiping him with wet hands. I feel that he has not been cleansed properly. I brought him to my house immediately because wherever he touches with wet hands will become naajis since I still didn't wash him properly. The areas that he touched with his hands became naajis, so do I have to wipe that area that he touched also?

2. There are soiled urine clothes. Previously I used to wash them in a bucket 3 times but I don't squeeze the water out. Must I wash the clothes and clothes dryer rack again or will just wiping the clothes dryer rack suffice?