This doesn't look great ...

We spotted Britney Spears driving home in her Mercedes G-Wagon on Sunday -- Mother's Day -- without her kids but with her bodyguard, and looking a little worse for wear.

Let's be honest -- we remember the days after her breakdown in 2008 when she seemed a bit ... anesthetized, kind of zombie-like ... and don't her eyes look a little blank in these pix?

We really hope we're wrong, but with all that's going on with Brit's conservatorship -- her co-conservator Andrew Wallet quitting, her dad's illness, and a judge's recent denial of Brit's request for more independence, things aren't going extremely well. We hope it gets better for Brit!