The person called Robin is probably very into social media and posting stuff for likes. She is SO into this that she liked her OWN post! So her friend is asking if she is "that lost for IT" (IT meaning her obsession with social media) that she liked her own post, which is kind of embarrassing. Other examples would be if you were very much in love with somebody that you don't see their flaws. You friend would ask you: "are you that lost for it that you don't see how arrogant he is?" Or you need money very badly, but you steal from somebody instead of doing the right thing: "are you that lost for it that you had to steal?"

I believe you meant あたま instead of あなま in the first part of your sentence. If that's the case, it'd be something like "today my head hurts, my hand hurts, and my feet also hurt."