Option one:
Make a go-around single handed while securing the other guy, declare an emergency, call cc1 and tell her/him what´s going on, comply with restrictions in altitude/track during missed approach. then make another approach (look for better weather, or if landing at same airport, why go-around in the first place) worry about fuel status......etc...etc...
Option two:
Continue the approach, declare an emergency, and let the autopilot land the plane. Call for a doctor.
Which one should be the safer one? Hmmm?