You are def not alone, I am going thru the same, working nights, have no life, bad unit with not enough staff, bad management, aching body 24/7! list goes on and on. Start applying at some other...
ER doesn't hire LPNs due to the fact that LPNs duties are very limited. They are not allowed to take some of the doctors orders, give IV push meds, give blood products etc. So getting your RN degree...
It will be harder since its an outpatient setting, try to remember the MOST common questions they ask when it comes to the patients, maybe make your own report sheet for each patient like the one...