I Have A Thumb Where The Joint Is Locked Up.

I have a thumb where the joint is locked up. It is worse in the morning after I have been inactive all nite. I can hardly bend it. Its like you have to break it to get it unlocked. I also have a big toe that feels numb. Is this a result of a pinched nerve. I have been going to a chiropractor every week for 6 weeks and could it be the result of the shift of my spine into the correct spot over a nerve??