Ticking Time Bomb

My life is like a ticking time bomb. I keep myself busy. Otherwise, I will hear that annoying ticking sound. I don't know when my immune system is going to flare up again. I just stay happy and optimistic. I wish to enjoy every single moment of my life.

I was informed by the immunologist that pregnancy can trigger my ankylosing spondylitis activity again. Should I or should I not take the pregnancy risk? Immune suppressant may cause cancer. What if I have a double jeopardy- miscarriage + ankylosing spondylitis + cancer? What if my fear will not happen?

Should I just use optimism and gut feel on this matter? What if I regret of not trying IVF in the future?