How can I deal with severe Waswas during Salah, such as constant doubts about laughing, praying too fast, number of Sujood, Rakats, and gas problems?
Repeated doubts (Waswasah) is initiated and promoted by Shaitan to disturb first us and deprive us from the real taste of worshipping Allah (SWT). We must realize that it is from Shaitan, then try to tackle it in every possible way. We should never listen to the whispering (Waswasah) and must ignore it all the way. We need to decide to ignore any thought or doubt from the Waswasah and focus on that. It can take little time but it must get us free from Waswasah.
Wassalam.