OMG you poor love!! Sorry but I just had a little giggle I was really gassy too and it smelled pretty bad from memory. My cat went to heaven 2 weeks before bub arrived but I don't think it was the farts that killed her, lol. One of my friends was so bad that her hubby moved out of the bedroom for a while....
I think it's just your body changing with the pregnancy and the hormones. Hope it improves soon! Way to go on 22 weeks!