Oxygen not effective and cycle changing?

[Seattle cluster]

I didn’t realize this thread kept going   My cycle must have ended because when it does I try to forget all about these   I didn’t realize there were so many different size tanks and am grateful the VA gives me an M tank just wish I had one of my old oxygen companies  I just mentioned in my post that I bought that mask but never had a chance to use it until this cycle   I definitely think it has made a difference  I just had my tank replaced and finally got to experience what I have seen you guys speak about as far as the bottom of the tank being less effective   I actually think it messed me up more than if I didn’t use it but who knows   Someone mentioned Red Bull/ caffeine I tried it a few times didn’t seem to work that much but last time I slammed a sugar free 5 hour energy to abort an attack it sent me in to maybe the worst one I ever had to where I was actually throwing up from pain so not trying that anymore