Is being a crna as stressful as being a nurse?
More so, without question. There are days that it all goes smooth as silk, and then there are days where you are challenged in every way. Anesthetic misadventures can carry dire consequences. The weight of responsibility in this career is something you should consider carefully. Some believe that the pressure and stress (not just with sick patients, but also on days when your patients are relatively healthy, but you are flying through your cases because you have 5 on the schedule in an 8 hour day) may be a major contributing factor to the rates of drug use and attrition in this specialty.
I laugh everytime someone tells me, "why are you doing anesthesia? That's so boring?". I haven't been bored yet, let me tell you...