Calculating Qadha Salaah

Q: I am confused on how to proceed with missed prayers. I am very ashamed of my past as I missed a ton of prayers due to laziness and ignorance. I have repented and I am trying to not miss any more prayers. I have been given 2 different instructions regarding the missed prayer.

1. All missed prayers should be made up with Qadha. One should calculate estimate of all prayers missed and offer qadha as much as one can.

2. It is not necessary to make up the missed prayers as Qadha as since prayer has a set time and once the time limit for the prayer has gone it cannot be done. One should repent and pray more sunnah prayers such as tahajjud and sunnahs of the fard prayers.

Which one is correct? Most people who gave me advice have advised 2 and quoted Al-Muhalla, 2/235.

Q: Please advise on qadha and nafl salaah. I have many qadha salaah to make up and have started performing my qadha salaah after every fardh salaah.

Alhamdulillah, I am also in a habit of waking for tahajud and use this opportunity to make dua and perform qadha salaah too.

I am curious about nafl salaah. Allah advises us to seek His assistance through patience and salaah. With so many outstanding qadha salaah, I feel ashamed to perform nafl salaah imploring Allah's assistance, even though I am in great need of Allah's help.

I have received conflicting advises regarding this. My brother (who is becoming an aalim- 5th year) advised that I should use the hours of tahajud to perform nafl salaah. An aalima that I'm close to, advised that I should payback my qadha as a matter of priority.

What I have been doing since, is using the opportunities where one might perform nafl salaah to perform qadha salaah, for example tahajud, salaatud Duha. And for instance, instead of performing salaatul Hajaat, I'd perform qadha salaah and make the dua of Salaatul Hajaat.

Q: I have missed so many salaah during the last 10 years since becoming baaligh. I have no idea how many and cannot estimate. It is a major sin but I don't know how to go about rectifying it. Should I just make qadha for 10 years because it's impossible to calculate?

Also, do I include Witr in my qadha. 

Q: I have many qadhaas over the past 3 or 4 years. I've tried guessing but I have absolutely no idea, records, nothing. I usually pray all 5 prayers on time now, so would it be okay for me to start praying my qadhaas without making an estimate?

As I've mentioned, I don't have the slightest clue with which to make an educated guess. The longer I keep trying to estimate, the longer it gets put off. It's been two years already.

Q: How should salaats missed over several years be performed and discharged in a situation where one has no record of the number of salaats missed and from when?

One also does not know when one had become baaliq, in which case, does missed salaats have to be estimated from the age of 12 or 15?

Q:

1. How do we know number of missed prayer when we used to pray occasionally (based on years) and how to perform those missed prayers?

2. Can we attach one extra prayer in lieu of missed prayers in Fajr and Maghrib?

Q: I missed 25 years of salaah. I was told that I have to make up for all the missed salaah. I did not know until now. Do I still have to make up for the missed salaah?

Can I make taubah and promise Allah Ta'ala to perform each salaah from now onwards without missing a single salaah? After making taubah, must I still perform the 25 years of missed salaah?

Q: For the first few years of life, after becoming of age I did not know that the normal discharge a female gets breaks wudhu. I therefore did not make a fresh wudhu when I should have. Does all the salaah I performed in those 3 or 4 years have to be repeated?

Q: What is the method for qadhaa namaaz and fasting?

Q:

1. I have a lot of qadha salaah and I don't know exactly how much, how should I calculate all my salaah?

2. While performing my qadha salaah, can I perform all the Fajr, then all the Zuhr, then all the Asr and so on?