Struggling with Focus During Congregational Prayer

Asalamu alaikum everyone. I've always avoided praying in congregation at the masjid or even with my family because I have this intense worry about passing gas during salah. Recently, we were out and Maghrib time came. My family encouraged me to join the brothers at a local masjid. I tried so hard to hold everything in, but unfortunately, some gas still escaped while I was in prayer. I felt too embarrassed to just stop and leave, worried about what people would think, so I just continued with the motions until we finished. As soon as it was over, I rushed out, made fresh wudu, and prayed again by myself. When my parents asked why I took so long, I was too ashamed to tell them the truth. This keeps happening to me in group prayer, but it almost never happens when I'm praying alone. It's really affecting my ability to join the jama'ah.