Welcome to the forums. Your post is one I think so many people will sympathise with! I sure do.
I'd never considered myself as someone with anxiety. Very anxious about everything was my 'normal' state of mind ... (and so was Irritable Bowel Syndrome). Experiencing physical symptoms of anxiety can be very distressing, I feel for you.
Focusing on reducing your anxiety is a good plan. Reducing exposure to stresses is a good start too. Over the years I tried exercise and meditation too. Healthy eating. Some people swear by things like massage (not my thing). There is a long thread in the anxiety section where people share what helps them which you might like to read.
But I also wanted to bring up the idea of a medical approach as an option. It's ok if meds aren't an approach you want to take. But seeing your doctor might be worth considering if your symptoms start causing you distress.
I found sometimes people dismiss the effect tummy upset and pain can have. If you're unable to leave the house or taking leave from work often it is a huge problem. Being in pain and feeling out of control can get you down too. It did for me.
Hopefully you find something that helps your symptoms soon.