I know exactly when mine started, why, and what triggers it.
I was very laid back until I was diagnosed with Crohn's Disease in June 2011. But it started a month before that when I had a panic attack that I thought was a heart attack. Since I had no idea what was wrong with me it played havoc with my body, and probably contributed to the flare that led me to the hospital and their findings of inflammation in my colon. I'd probably had Crohns all my life (I had 3 fistula repairs in 3 months as an infant) but it wasn't until that month long panic session which threw it into overdrive.
Of course it didn't end there. I was put on high doses of Prednisone which made my anxiety even worse. The anxiety meds I had been given weren't helping much until I started to taper down the Prednisone. But not to long after, in August, I started a new Crohns med, Imuran. Which lead to me getting Septic Shock / Renal Failure and landed me in the ICU for a week. I thought it was the Imuran but since I never saw my GI I was told to continue it. Three days later I was back for another week with acute pancreatitis and a UTI. This time my GI was called in and said yep, that med is no good for you.
Those incidents have led me to become hyper aware of my body, and sometimes even things like a minor cold get my anxiety going again. I'm always afraid of becoming seriously ill and near death as I was when I had sepsis. But as long as I feel fine my anxiety stays at bay.
What's funny is that even knowing all that I can still get very anxious when I'm sick. The brain is a very powerful thing.
35 Male - DX 06/11 with Crohn's Disease
Meds - Remicade, Lisinopril, Zoloft, Mirtazapine, Xanax, Prilosec, Carafate
Supp - Fish Oil, Niacin