AS New User of Humira - What Can I Expect?

So I have AS, was diagnosed a few years ago, though I have probably had it my whole life. I was taking Methotrexate, but it seems that my inflamation is going up. I have bone fusion in most of my spine and now in my neck. I have lost mobility. I am 45 years old. I never thought the disease would catch up to me so quickly. But in the last year it has gone crazy and a once yearly xray is just not enough, should have been doing it every six months. My Rhummy wants to put me on Biologicals, specifically Humira. I see all the side effects on the product descriptions and it's quite frightening. Wondering if folks could share their stories of how it worked for them? Thanks!