Struggling with GERD and IBS-D: How to Regulate Symptoms?

I’m no stranger to GERD but IBS-D is brand new to me. As in, I’ve apparently been mid flare for nearly a month and this is the only explanation. How do I even begin to figure out how to regulate this? Just when I got my GERD under control, this happens. I’m frustrated, miserable, scared to eat and ready to give up on eating anything ever again. Maybe it’s middle age. My body has just decided to turn traitor and the hits just keep coming. Someone tell me I can figure this out and that my life won’t be spent obsessing over managing symptoms instead of living.