Hi dazed,
First of all
CONGRATS on coming out of the depression, that's
great news and
really pleased for you!!!!

And the having nothing really to be anxious about..........I'm not so sure you need something specific to be anxious about, to be anxious............sometimes there can be no identifiable reason, sometimes it can be
lots of smaller things (things that don't seem that significant on their own) all building up and overflowing, sometimes you can even feel anxious when there are good things going on/about those.
But it could easily be a side effects of the new medication making things worse too. Doesn't mean to say that those side effects won't decrease or fade away, but...........
And the rocking, that could be attached to anxiety, but do you think maybe it could be a calming/relaxing motion against the anxiety instead?? Maybe something "grounding you"?? And
if you're sometimes not feeling that anxious at the time..........then
maybe it's working

.
And at night maybe the agitation is more noticeable, because it's quieter, less to distract you, less to focus on??? Sometimes there can be an edge of hypomania on coming out of a depression (if you have mood swings or bipolar??) although that doesn't need to mean that you're heading straight back there, of course. Then maybe it could be the times you're taking your medication as well, when the effects are the most or the least strong??
Perhaps try to keep a log of everything going on for you for your next consult with your doctor/pdoc, might help a lot with them monitoring/reviewing your meds.
It's really good that you have supportive people around you though, people who seem to really care about you. You've clearly earned a lot of love/respect/support just from being who you are

And hopefully we can offer you plenty of understanding/support too, there are a lot of great people on here. So good to meet you, and welcome to PC!!!!
Alison