I made sure to get one last prescription from my private endo before I had to switch to the low-cost clinic, so I was able to have a reserve vial of T (ten milliliters) to ease my anxiety. If I didn't have the reserve vial, I would obsess constantly; I don't need that.
I keep the vial in my safe. When I bring home a new vial, I put the it in the safe and use the old vial. I've never injected more than I should; I just need back-up in case (and it happened just this December-January) my refill doesn't come through in time.
Apart from that, my scrip is for ten milliliters, but my insurance will cover only a month's worth at a time. So I simply pay out of pocket. For T, the cost is minimally higher. Can you do this with E?