Is this what spiritual attack feels like?

All week long, I've felt like I've been on the verge of tears.

Constantly.

And I have no idea why.

Even when I'm with my friends and I'm laughing, or I'm in class and I'm thinking about the work, I feel like I'm about to start crying.

I have no reason to be sad!  And I really felt like I had a better handle on my stress.  And it's not like I've gotten any bad news, or gotten in any fights with friends, or anything like that.

I tried to ignore it.  I didn't want to talk about it on here because I thought that it would go away, but it didn't.  It just got worse.

And now I'm sitting here watching Private Practice and crying (granted, watching a show about giving a drug addict an intervention probably wasn't the smartest idea being in this state).  I feel like every muscle in my body is in pain.

I want to know what the heck is going on in my world right now.  I want to know why I feel so sickeningly sad when I have no reason to be.  I want to know why I'm suddenly paralyzed with a fear of everyone in my life when this semester was the FIRST time that I ever actually felt secure in my relationships.

God, what is going on?  Please help me.