Incredible that you set such a pace, coming back from JFK and jet lagged after "la dolce vita" for the past couple of weeks. Good luck getting back on US time. And going for it before the season ends April 30.
Interesting how generally refreshed I felt after the long rowing lay-off. You may find that if you take a week or two off you can put up some good times before the end of the season, too.
Rest is important and cross training keeps you fit and not burned out of course.