Was this your own page/profile or on someone elses? If somone else’s page, then yes, they may have banned you from that page. Or, are you saying that you simply cannot log into your page and profile? If you can, try from another computer. Try resetting password. Do you get more error, did you get email saying you were being sanctioned? Even if you cannot log in and access it, is your page still active and accessible. Have someone else log in and try to access it. Contact Facebook.
I read it rarely and post very infrequently. Just thought it odd that suddenly the most popular social site was unavailable after posting a non popular position. Paranoia? Nah!