If you have PTSD or an anxiety disorder, some days you have to take breaks between your tasks. Different people are triggered by different things and becoming overloaded can result in a complete meltdown or panic attack.
Pushing through your day without a break to calm yourself will drain you. It can take a lot of energy to do errands and activities, when you are being exposed to triggers in your environment.
Being sleep deprived can add to your anxiety. It is important to find ways to get enough rest and sleep. If anxiety keeps you from sleeping well at night, your body and your brain may require naps during the day. Self care is important.
If you need breaks between doing things, try to think ahead to plan enough time to take them. Be gentle and adaptable with yourself.
You are your own best advocate. Draw boundaries when you need them. Think of how you would treat a friend in circumstances like the ones you are in at the time, if your friend also suffered from PTSD.
Sometimes it gives some perspective to think of what allowances and flexibility you would offer someone else. Looking at yourself from an observer point of view can help you gain some perspective and design coping methods for yourself.
Sending love and healing energies,