I know it's been a long time since you wrote this but Stickman Communications has excellent cards you can just show people so you don't have to explain when feeling unwell. They cover so many health conditions including POTS

HI, I don't have pots but my illness responds almost the same way. I try to evaluate what I can do and what I can't, choosing stores and places that work for me and timing is crucial. I plan like one large thing a day if I fell well, if not I take it as a time to reassess and not stress about it. You may want to plan to go to places that have chairs or benches to sit or use those mechanized wagons so you can stop and limit what you do. Once you have a better handle on rating your days and events out you will have less bad episodes and less ptsd triggers, I have family members with ptsd so I am always alert to that, although mine is more a physical trigger it was really bad at one time with tons of anxiety attacks causing ptsd symptoms, until I learned to manage better and embrace where I was. Like all things embrace the issue and use your skills/talents to work through it or find other answers. Have things delivered where you can and when you really need help find a method to deal with it that is acceptable to you and gets you what you need. So when alone I have people take my groceries out because I just never know how fatigued I will get and I still have to drive home. I hope anything here helps you. Ptsd dogs can help but it is another layer of responsibility that you have to take on, but for many it is a new way to figure things out. Also get support and counseling that respects you condition and beliefs, meditation and epsom salt soaks and baths also I hear are very good, even if you are just soaking your feet. Cultivate beauty on youtube has nighttime rituals that may help, a good nights sleep is very precious. Don't forget with the internet the is also on-line support, you can even start your own group. Prayers to you and may you find your answers.

Ana Larson I have my rollator which has a seat to sit on but with POTS sometimes I've noticed sitting on the floor is better or even lying. I do try to limit my activities but some days I can be okay leaving the apartment but halfway through the store or even at the beginning my heart rate can spike and I get dizzy and nauseous. so sometimes it's unavoidable and if sitting on my rollator or a bench doesn't help, I HAVE to get on the floor. my issue is people coming up and asking what's wrong or trying to pet my service dog. I know they mostly mean well but when I'm in a weakened state anyways, my anxiety and ptsd get triggered. so I was wondering how others handled the situations, what they say to someone whose asking questions and so forth.

Maybe something here may help www.google.com/webhp?sourceid=chrome-instant&rlz=1C1CHBD_enUS707US707&ion=1&espv=2&ie=UTF-8#safe=active&q=tecniques+for+dealing+with+pots

Maybe print a small sign that says "I'm okay. Please give me space." and another sign that says "Help me I am having -----."?

Good idea, some times the most direct approach is the best one.