Well apart from telling my sensei of my back problems I've decided to seek professional advice.
I've also decided change chiropractors since my current chiro asked me to pay upfront for a whole year and schedule 52 visits. Alarm bells anyone!?!
So I've been recommended a chiropractor who treats people from my school and also is Aikidoka himself.
So if anyone can tell me if this is something I shouldn't be doing then he's the one.
Thanks again guys for all your encouragement and advice.