Irregular bleeding

Q: I'm suffering from a gynecological disease and I just got a procedure done by the doctor. With that I will get irregular bleeding and a lot of brown discharge which I assume is blood. I want to know that with this bleeding can I fast during the month of Ramadan and pray. It is said that menstrual bleeding will be irregular so I'm not sure if it's menstrual bleeding or its due to the procedure done. This will go on for 3 to 6 months. Some days I get it some days I don't. Please let me know what can I do?

Sincerity

Q: Sometimes I feel that when I am doing some act of righteousness or I intend to do it, I feel this weak sincerity and sometimes I try to force myself that I am doing it only for the sake of Allah, but still my sincerity is weak. I don't stop to do the act anyway but I would like to know if my deeds will be accepted.

Sitting on a chair and performing Salaah

Q: I am 50 years old. I have been making namaaz regularly in the musjid daily all my life and for the past year or so. I make namaaz at home and only jumah in the musjid. This is due to chronic pain in my feet, toes and legs and I can't bend my toes anymore hence I sit on a chair when I make namaaz. I only go for jumah and don't sit on a chair at jumah. I make the two rakaat fard of jumah normal though I go through great pain. As soon as the fard is over I leave the musjid instantly. My great worry is that recently I read that we can't sit and make namaaz. The article read beware of the chair and stay away from the chair as namaaz on a chair is not accepted. I am in deep worry and cry a lot daily. I am unable to go for treatment to a private doctor or hospital as I am a pauper. I cannot go to government hospitals as every person I know with feet problems like mines land up with operations in the government hospitals but either loose their legs or land up with their feet being worse. I don't drink nor smoke. I strictly eat halaal food and live a clean life but still have this problem. I want to know if all my namaaz I made sitting is baatil. Yesterday I put pads around my feet and legs and attempted namaaz standing but the pain extends to my back. I am not cripple nor old aged and have no sickness so old age is not an excuse. Kindly advise what to do as I am unable to go for treatment so this pain becomes worse hence I will be sitting and makng namaaz.

Sunnah method of ghusal

Q: Is this the correct method of ghusul? First do niyyah, then wash hands up to wrist three times, then gargle three times, then wash the private areas. Perform wudhu like normal, pour water over the head three time and recite kalima, then wipe off water from right shoulder three times then left? I have been using this method.

Rajab and Sha'baan dua

Q: Nabi (Sallallahu Alayhi Wasallam) made this dua from Rajab. Allahumma baarik lana fee rajab wa shabaan wa ballighnaa ramadaan. When the month of shabaan commenced did he drop of the word rajab and only mentioned shaabaan? If not, will it be better to stick to the actual words of the hadith or recite only shabaan as many people are doing including imaams of musjids?