Salaah

Q: After every single namaaz can I do sajdah twice then make salaam and count it as sajdah sahw. I feel like my namaz isn't perfect that's why I do short sajdah sahw after every namaz.

Q: Can I say aamen in sujood after making dua and after Durood in namaz? 

Q: I am staying in a different city as I am working there but I want to know whether I will offer qasr salah if I go to below cities for less than 15 days

1. City A where I was born and don't reside now but I have a home which I gave to rent

2. City B, I have flat there but I don't reside and go once in a month

3.City C, my in laws home.

What should my wife offer here Qasr or full?

Also during Haj we stayed in Makkah for 14 days and on 15th day we left to Mina before Fajr. I offered Qasr Salah but when I came back few mufti's told you were muqeem. I told them once you reach destination from that time you should calculate 15 days. But they mentioned we need to calculate from our home and also even if we stay for one hour of a day we should count it as one full day. Is this correct? But I told them how you can assume one hour as one full day. Is my understanding correct?

Q: In almost every salah I tend to think that I skipped something that I need to do sajda sahw for, but I believe it is not correct everytime. No matter how much I tend to focus and not do sajda sahw, I think that I skipped this out or that. What is the ruling in such a case?

Q: If a woman performs salah with 3/4 length trousers and then tights under them, wherein no part of her leg is visible, is her salah valid?

Q: I was performing two rakaats of salaah, and when I stood up for the second rakaat, I began reciting attahiyyaat by mistake. As soon as I realized, I stoped reciting attahiyyaat and started reciting Surah Faatihah. Is my salah valid?

Q:

1. When a man is praying maghrib alone, is it best for him to recite loudly or silently? 

2. If he chooses to recite loudly, should he also say the takbeers, samiAllahu liman hamidah etc loudly as well just as an imam would have done?

Q: In order to catch up on my qadha salaahs I have been reading them straight after fajr during sunrise not knowing it has been wrong to do so, is my salaah valid and should I re-read all my qadha salaahs that I have read at this time?

Q: What is the procedure to be followed:

1. If we missed the 2 Rakat sunnat of Fajr?

2. If we missed the 4 Rakat sunnat of Zohar prayer before Farz?

3. What is the sequence to be followed for Sunnats after Juma prayer (2 Rakat first and then 4 rakat or the opposite of it?)

Q: What should I do if I pray 3 rakaats instead of 4 rakaats mistakenly?