Prayer

May Allah cure your illness. Pray sitting or laying down, but you must pray in any form possible. No one is excused for not praying.

If the masjid was built on the grave, you must repeat the prayers. If the grave was introduced to the masjid, some say that as long as it is not in the direction of qibla, it is ok. I am inclined that praying in that masjid is not permissible as well.

This is not true and there is no such prohibition as he claimed. It seems that he is mixing another hadeeth when the companion bowed at the entrance of the masjid and walked in the bowing position until he was in the row. The Prophet salla Allahu alaihi sa sallam told him after the salah […]

If he is not sane anymore, prayer is not mandatory upon him.

You may do that in the prayer. However try to focus more and be confident and strong!

Your first Rakah was the Rakah with the Imam. When he makes Salam, you stand up and offer your second with tashahud and then your third Rakah as usual.

By repeating the word over and over again means that you have a serious problem in your prayer. This may lead to invalidating your prayers for engaging in an act that takes it out of the norm. Never do this again.

Yes, in shaa Allah, provided you caught the first rukuh before the athan. If not, it is not valid.

If you got the last Rakah with the imam, this is a valid congregational prayer.