Conditions for the validity of Salaah

Q: If I started my zohr namaaz at 4:00pm due to being sick, and asr namaaz came in at 4:03 whilst I was reading my salah, do I have to repeat the zohr namaaz?

Q: I have difficulty concerning covering my awrah during prayer as a female.

1. I have quite a small forehead, and the hairs that cover the sides of my forehead are not the same length as my hair overall, but they’re longer than a person’s usual baby hairs. It causes me to overly look in the mirror and fix my scarf before salah just incase any show, and also causes me to bring my scarf down really close to my eyes. Due to this difficulty, if these certain hairs show during salah, can I overlook this?

2. Another thing I have a lot of difficulty covering are my wrists. Even If I try to use long sleeves, sometimes during sajdah the sleeve of my wrist gets lifted upwards (like towards the ceiling) - if that makes sense - due to me laying my forearms on the ground. Today, I saw my sleeve on my wrist during salah and it looked lifted and I had a slightly strong feeling that the way it looked it was probably showing my awrah but I didn’t attempt to change it because I was confused about what to do. I couldn’t tell if more than a quarter was showing or not from the angle I was sitting. I was also not sure if I should have moved to fix it regardless of if it was less than a quarter.

- If I notice that less than a quarter of awrah is showing during salah, then do I fix it or can I leave it?

- Can you confirm if I properly determined the quarter of my arm during salah because I’m not sure if i’m doing it right. To determine if a quarter of my arm shows, does it mean that my elbow is considered the halfway point? I feel guilty because I felt like if I had a strong feeling that my awrah was showing, I should have hidden it.

Q: I burst a pimple on my thigh to remove its pus, and just rubbed the pus with my fingers, then I wore my undergarment and pants without cleaning the pus and/or blood that got stuck on my thigh after rubbing the pimple, nor did I clean my hands. Now, some amount of pus will stick to my clothes.

Is it allowed or okay to pray in those clothes and without cleaning it (pus) with water on my thigh and fingers or without taking a shower? I read on some websites that a small amount of pus or blood is okay and it will not break the wudoo, but my question is, will the clothes become najis after such activity or shall I take a shower to make myself clean before I pray, or at-least clean only where pus or blood got stuck? 

Q: A Salaah Time Table has one time named as 'Sehri' and another time named as 'Fajr.' Of these two, when does the time for Esha Salaah end?

Q: Do I have to wear a topi when performing salaah, or can I perform salaah without a topi? 

Q: If I wake up 15 minutes before fajr, can I pray tahajud or not? 

Q:

1. When I make wudhu, water splashes on my thighs and my pants becomes wet. So when I pray, while in the sitting position, the skin from my thighs become somewhat visible because I wear white pants. Is my prayer valid?

2. When I pray, the wind from the fan hits my clothes and the shape of my private part is visible. Also, when some people go into sajdah while wearing pants, the shape of their testes are seen, is the prayer valid?

Q: I have seen many women read salaah with tights or skinny jeans and they put a burqa over. The burqa ends around their knees and the rest of their legs are visible. Is the salaah valid?

Q: In our country, fajar prayer starts at 3.50am and magrib starts 6.50pm. What is the correct time to perform tahajjud prayer?

Q: A person goes to visit someone else and they read salaah in their house. Later on they discover that the qibla they faced in salaah was incorrect and was in the opposite direction. Do they have to repeat all the salaah they performed at the house (including in the past)?