Stress makes it harder for us for sure. We are experiencing some stress atm and we are dissociating a lot - which isn't usual for us, we're generally pretty stable these days, even when stressed. I guess it's the type of stress that makes the difference.
During this period of stress we have felt much like you describe - headachy, floaty and light headed, generally 'laid bare' and having lots of dissociative symptoms, including losing time again.
Sounds like a good idea for you to get some sleep. Us too! I hope you rest well. General self care stuff definitely won't hurt you and might even help some.