Feeling Apathetic and Anxious: What's Wrong with Me?

Weird thing is happening tonight- suddenly, this evening, I realized that the only two things I feel right now is a decent level of anxiety, mostly pertaining to a driving trip I have to do this weekend, and total, complete apathy about anything else. My (amazing) boyfriend? Eh, nice guy. My oldest dog (light of my life)? Yeah, she's cute I guess. Baby dog (adorable little bundle)? Meh, usually annoying. S** seems gross. Food is overrated. I haven't even gone down to hang out with the guy and dogs yet even though I've been asked to because I just don't care enough. What is wrong with me? I got so angry at myself last night that I bruised my hand hitting a table in frustration, I can sob my eyes out thinking about losing one of the people I love, I'm usually a giant ball of all the emotions all at once... Why don't I care AT ALL tonight? and why am I so anxious about this?