5 rounds of AMRAP for 3 mins, then rest for 3 mins -Row 500m then AMRAP of burppes in time left in the 3 minutes Workout

I read this WOD and thought it would be a nice change of pace and would work my weakness of rowing, especially repeats. MENTALLY though for me. Always glad when I finish something I want to quit.
I ended up doing 18 burpees every round.
My clock stopped at the begining of my 4th round so I just pounded it out as fast as possible to make sure I was within the 3 minutes. Then I reset the clock and that next 3 minutes of rest was back on pace.
I would say that I was getting more and more taxed each round but was able to be pretty fresh for each start, but I was getting more winded and taxed at the end of each round.
I stretched a little bit, for about 5-6 minutes and then went home to facetime the kids.
I am tired and worn out a bit.
I worked late into the night sanding the kids' bedroom ceiling. I will clean up tonight and may have to retouch up the ceiling in a few spots and then of course resand, but it's getting close to done.