Adam -
I strongly suggest that if the spine went into you that deeply, you hie your hienie to the doctor ASAP, get the wound flushed if needed, and get yourself shot up with Doxycyclene and Cipro. And if there's any redness around it tomorrow morning, don't wait 'til Monday to get that checked out!
The problem isn't especially the poison on the spine but the bugs in the saltwater, and they can get you BAD this time of the year!!!!
I am not kidding you!
Pete