Hi :) and question about oxygen in cars

Hi I'm new here but unfortunately not to CH. I'm 27 but CCH Since about 13. Also with migraines and tension headache.- hereditary from my 'mother'.

I'm no longer able to keep a job down as well as my CCH, I am tube fed into my bowels as I have gastroparesis. Severe brittle asthma- put me in ICU too many times. Spinal problems so use a wheelchair, fibromyalgia, M.E etc I think my body just hates me!!

I was a pararider, but recently lost my horse due to illness. So I've no hobbies left really I like crafting but I can't focus on it enough to complete. So I'm a little lost right now. That's pretty much all about me!

I had a question I've always wondered but nowhere to ask. I have my o2 on a demand valve because I go through so much. I've gone through half a static tank in about 24 hours ouch!! Should I display a sticker on my car about my o2? I've seen some cars with stickers so I just wondered

Thanks xxxx