Reciting "​​La ilaha illallah" 70,000 times

Q: Is it an innovation to recite Kalima "​​La ilaha illallah" ​​70,000 times with hope that the deceased will be saved from the punishment of ​​grave and ​​Hell fire? I really wish to know that and is thinking of doing this for my mother who died on 5th July 2017. Help me in this regard and please pray for the forgiveness of my mother and all the muslims.

Wazifa for happy married life

Q: I have two questions:

1. My husband applied for British passport but since one year he got no reply. I applied after him but I got a British passport within two months. Please  tell us any dua to read.

2. My sister got married in march 2017 but her husband is not good. Now his father in law died. She is in Pakistan but her husband is not willing to bring her to the UK. Can you tell us any dua or surah to read for a happy married life and she will able to come here. 

Thoughts of talaaq

Q: My wife and I were having a conversation. We were talking about something regarding the sleeping patterns of our child. She wanted to try a different technique for our child who wakes up often at night to feed. I made the statement "Why don't you go to your parents house and try it". Prior to making this statement my intention was she go to her parents house for holiday. However I was aware that certain statements of this nature may constitute talaq. While I was making the statement, the thought and feeling came in my mind that my intention is talaq. I suffer from waswasa with certain things like whudu and salaah.

Does this constitute talaq?

Using condoms

Q:

1. Is it allowed to use condoms with consent of both (wife and husband).

2. Use of dental dams (a streched thin rubber used to place on female private parts for kissing her private parts to prevent infection) has any concept in islam and can be used?

Inaudible Dua after Salaah

Q: I would like to know the ruling concerning dua after the congregation in the masjid. Should it be done audibly or should it be done inaudibly. Some people take offence at the fact that in certain masjids the day after congregation is made inaudible and they feel that because it is a congregation we should make the dua are similarly for everybody in an audible voice.