Since you said co-worker, I am assuming she is your equal and not someone you report to. Eight more months of putting up with this situation is a really long time, so I think you should address it with Jane. “Jane, I think you over reacted to a really minor situation yesterday. This seems to be happening quite a bit lately and it’s something we need to talk about. Is there a reason you keep jumping me? Is this something we can work out or should we both go to the boss?” Maybe not so blunt and of course in your own words, but I think you need to discuss it with her. Good luck!