Urine splashes on toilet seat
Q: I have had rectal problems for the past couple of years and I try to keep a slight gap at the back when I sit on the toilet. However, it felt like something fell on my back and I knew for sure it could not have been urine splashing on me. Later, I tried to check if urine splashes fell on me, but I couldn't tell. When I went the third time I saw one splash fall on the seat, so I was worried if this was happening all the time but I was unaware.
My questions are:
1. Do I have to have a shower and change anything that could have come in contact with me?
2. Are all of my prayers valid?
3. Have I made anything najis from touching that part of my body?
4. This is how most people use the toilet so should I tell my family members to be careful and sit all the way back.