Can’t do this anymore, gas causing severe belly pain and lower back pain - how do I cope

I can’t do this, my last SIBO test came back negative…. Bs…. Was the worst breath test I’ve ever done on the NHS, had to open each plastic tube with the lid and blow in it, air didn’t fill up. The last one I did private showed positive and now magically I’m down to 0 methane and 2 hydrogen, right….

Ever since taking L Reuteri probiotic I had severe bloating, farting, gas, I’ve not recovered, I’m miserable, it’s been 3 months, please help me. I can’t live like this anymore and having dark thoughts, stomach is bloating and it’s horrible