Bloating problem

I'm sorry to be so blunt but I am desperate. Is anybody else experiencing bad gas in first trimester? I am so bloated and and I burp constantly. Both make me feel incredibly nauseous, I wake up in the morning and the taste in my mouth reflects the sickness in my tummy. I brush my teeth so often I made my gums bleed. It's a vicious circle :/ I try to avoid heavy or aromatic foods, drink plenty of water but no significant improvement. On top of this I really worry about passing gas while in labour.... I know, stupid maybe but it would force everyone to leave! I have enough difficulty myself to tolerate this.