Facebook is making posts in my name?

Facebook is making posts in my name. Or, someone is. How can I stop it?
I did my usual Facebook scan today and I saw some horribly, horribly, glurgey pic posted next to my name. Gad! The shame. I don’t even post regular stuff on FB anymore. I just check it to see if old acquaintances have made themselves known. And to see this tripe, next to my icon and under my name…
I clicked on ‘delete this post’…naturally, I don’t know what page I was sent to, but it took me to some other page, and offending post wasn’t there. I clicked on some other offending post, and it took me to another of my pages…offending link was still there!
Is there a Customer Service or something for FB? I don’t see how anyone could have hacked my account, and I’m wondering if FB is doing this sort of thing to others to pad the count.

Thanks,
hh

On your account? An advertising app maybe installed itself without you realising, go into account settings>apps and delete any that look fishy.

Thank you very much!