Has anyone here had a similar experience of demonic attack?

I will try not to go into great detail, but needless to say, this issue has caused me a lot of social trauma in the last few years. The timing of the demonic attack is always well-planned to disrupt my ministry and witness. I serve as an elder at the church I attend, and from time to time I will be called up to give a message or teach a Bible study. During these times, the devil always afflicts me with a gas attack, leading to obvious discomfort and embarment while I am preaching my message. This also seems to happen during social gatherings and when I'm in a meeting with our pastor or other leaders of the church. Often, the rumblings from my gastro-intestinal tract sound like muttered swear words or like voices mocking Jesus. I am not the only one who has noticed this. I suffered an attack in an elevator at a conference I went to a few months ago, and one of the men in the elevator thought that he had heard me swearing at him and using an expletive involving the name of Christ. A sulfuric stench always accompanies these attacks and sometimes they can be extremely painful.