Something hacked my Facebook account?

So a couple weeks ago I noticed some things on my news feed that I never liked. They were really random like this one famous teacher person and something in arabic. I definitely NEVER liked those. So I unlike the about 5 unfamiliar pages and changed my password, and my email connected to it's password. Then today, I logged on to see "christchurch" updates and one other unfamiliar thing. What do I do? Did someone like hack my facebook again, or was it just a glitch on Facebook's behalf?