I originally planned to do my second 2 months after my first (this coming Monday, in fact), thinking about it similarly to @winemama. But when I realized how much of a burden my time off was going to be for my co-workers and calculated the increased caregiving load for my husband, I canceled the 2nd and will reschedule for Thanksgiving week so that I can recuperate over the end of the year and into early January. I work at a college, so that is a quiet time for everyone. Interestingly, I realized just last week that I was willing to do the 2nd one. Not that I expect the experience to be the same, but just having gone through it this time has relieved so much anticipatory anxiety.