I also have Ankylosing Spondylitis and at one time I did use the Enbrel injections but found they didn’t help me at all.
Having said that I also have Lupus which could have been brought on by using the Enbrel, but the doc’s proved that it wasn’t the Enbrel that induced the Lupus.
I have SPMS and nothing at all has been said that Enbrel induced it. Like me if you have MS, the symptoms could have been masked by the Ankylosing Spondylitis as they are very similar. I also have APS.
PM me if you want to speak more on the subject. I wish you the best of luck.