48 hours weekend at work

Dear Y,

             What a weekend! On call 48 hours, following normal working hours next day. Worked solo with constant workload from 8am-11pm for the 2 days with assistance from other teams and hence was mentally exhausted by 36 hours. All I want to do is just go home and sleep. Yet there are still things to do. As fatigue kicks in, the effectiveness gets sloppy, and I started to question the decision I made. I don't know how the others do it, but perhaps the more experience you are, the faster and more effective you work. Well, I got through it, and that's an achievement itself, hey!
                                                                                                                  jy